diff --git a/.openpublishing.redirection.csharp.json b/.openpublishing.redirection.csharp.json
index 557373cce2323..643dee94558de 100644
--- a/.openpublishing.redirection.csharp.json
+++ b/.openpublishing.redirection.csharp.json
@@ -379,6 +379,10 @@
             "source_path_from_root": "/docs/csharp/language-reference/compiler-messages/cs1742.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/parameter-argument-mismatch"
         },
+        {
+            "source_path_from_root": "/docs/csharp/language-reference/compiler-messages/cs1751.md",
+            "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/params-arrays"
+        },
         {
             "source_path_from_root": "/docs/csharp/language-reference/compiler-messages/cs1921.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/array-declaration-errors"
@@ -1456,6 +1460,14 @@
             "source_path_from_root": "/docs/csharp/misc/cs0206.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/ref-modifiers-errors"
         },
+        {
+            "source_path_from_root": "/docs/csharp/misc/cs0225.md",
+            "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/params-arrays"
+        },
+        {
+            "source_path_from_root": "/docs/csharp/misc/cs0231.md",
+            "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/params-arrays"
+        },
         {
             "source_path_from_root": "/docs/csharp/misc/cs0248.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/feature-version-errors"
@@ -1480,6 +1492,10 @@
             "source_path_from_root": "/docs/csharp/misc/cs0440.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/using-directive-errors"
         },
+        {
+            "source_path_from_root": "/docs/csharp/misc/cs0466.md",
+            "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/params-arrays"
+        },
         {
             "source_path_from_root": "/docs/csharp/misc/cs0514.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/constructor-errors#static-constructors"
@@ -1552,6 +1568,10 @@
             "source_path_from_root": "/docs/csharp/misc/cs0655.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/parameter-argument-mismatch"
         },
+        {
+            "source_path_from_root": "/docs/csharp/misc/cs0674.md",
+            "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/params-arrays"
+        },
         {
             "source_path_from_root": "/docs/csharp/misc/cs0687.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/using-directive-errors"
@@ -1572,6 +1592,10 @@
             "source_path_from_root": "/docs/csharp/misc/cs0748.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/lambda-expression-errors#lambda-expression-parameters-and-returns"
         },
+        {
+            "source_path_from_root": "/docs/csharp/misc/cs0758.md",
+            "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/params-arrays"
+        },
         {
             "source_path_from_root": "/docs/csharp/misc/cs0765.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/expression-tree-restrictions"
@@ -1608,6 +1632,10 @@
             "source_path_from_root": "/docs/csharp/misc/cs1016.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/parameter-argument-mismatch"
         },
+        {
+            "source_path_from_root": "/docs/csharp/misc/cs1104.md",
+            "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/params-arrays"
+        },
         {
             "source_path_from_root": "/docs/csharp/misc/cs1510.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/ref-modifiers-errors"
@@ -1632,6 +1660,10 @@
             "source_path_from_root": "/docs/csharp/misc/cs1605.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/ref-modifiers-errors"
         },
+        {
+            "source_path_from_root": "/docs/csharp/misc/cs1611.md",
+            "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/params-arrays"
+        },
         {
             "source_path_from_root": "/docs/csharp/misc/cs1621.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/lambda-expression-errors#syntax-limitations-in-lambda-expressions"
@@ -1664,6 +1696,10 @@
             "source_path_from_root": "/docs/csharp/misc/cs1657.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/ref-modifiers-errors"
         },
+        {
+            "source_path_from_root": "/docs/csharp/misc/cs1670.md",
+            "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/params-arrays"
+        },
         {
             "source_path_from_root": "/docs/csharp/misc/cs1673.md",
             "redirect_url": "/dotnet/csharp/language-reference/compiler-messages/lambda-expression-errors#syntax-limitations-in-lambda-expressions"
diff --git a/docs/csharp/language-reference/compiler-messages/cs1751.md b/docs/csharp/language-reference/compiler-messages/cs1751.md
deleted file mode 100644
index 337752564df13..0000000000000
--- a/docs/csharp/language-reference/compiler-messages/cs1751.md
+++ /dev/null
@@ -1,41 +0,0 @@
----
-description: "Compiler Error CS1751"
-title: "Compiler Error CS1751"
-ms.date: 10/25/2022
-f1_keywords:
-  - "CS1751"
-helpviewer_keywords:
-  - "CS1751"
----
-# Compiler Error CS1751
-
-Cannot specify a default value for a parameter array.
-
-## Example
-
-The following sample generates CS1751:
-
-```csharp
-// CS1751.cs
-void Method(params object[] values = null)
-{
-}
-```
-
-## Solution
-
-```csharp
-// Explicitly passing null
-object[] values = null;
-Method(values);
-
-void Method(params object[] values)
-{
-    if (values == null)
-    {
-
-    }
-}
-```
-
-For more information, see [Params](../keywords/method-parameters.md#params-modifier).
diff --git a/docs/csharp/language-reference/compiler-messages/expression-tree-restrictions.md b/docs/csharp/language-reference/compiler-messages/expression-tree-restrictions.md
index 88f04a903efd1..9ea1d47aa9c6d 100644
--- a/docs/csharp/language-reference/compiler-messages/expression-tree-restrictions.md
+++ b/docs/csharp/language-reference/compiler-messages/expression-tree-restrictions.md
@@ -46,6 +46,7 @@ f1_keywords:
  - "CS8952"
  - "CS9170"
  - "CS9175"
+ - "CS9226"
 helpviewer_keywords:
  - "CS0765"
  - "CS0831"
@@ -92,6 +93,7 @@ helpviewer_keywords:
  - "CS8952"
  - "CS9170"
  - "CS9175"
+ - "CS9226"
 ms.date: 09/06/2023
 ---
 # Resolve errors and warnings generated from expressions prohibited in expression trees
@@ -146,6 +148,7 @@ That's by design. The text closely matches the text of the compiler error / warn
 - **CS8972** - *A lambda expression with attributes cannot be converted to an expression tree.*
 - **CS9170** - *An expression tree may not contain an inline array access or conversion.*
 - **CS9175** - *An expression tree may not contain a collection expression.*
+- **CS9226** - *An expression tree may not contain an expanded form of non-array params collection parameter.*
 
 ## Expression tree restrictions
 
@@ -177,6 +180,7 @@ The following expressions are prohibited:
 - Calls to methods that return by `ref` aren't allowed.
 - [static abstract interface members](../keywords/interface.md#static-abstract-and-virtual-members) can't be accessed.
 - [Inline arrays](../builtin-types/struct.md#inline-arrays).
+- The `params` modifier is allowed only on single-dimensional arrays. Other collection types aren't allowed.
 
 Other restrictions are:
 
diff --git a/docs/csharp/language-reference/compiler-messages/index.md b/docs/csharp/language-reference/compiler-messages/index.md
index f8817bb4774e6..0328ceaab8659 100644
--- a/docs/csharp/language-reference/compiler-messages/index.md
+++ b/docs/csharp/language-reference/compiler-messages/index.md
@@ -1,7 +1,7 @@
 ---
 description: "C# Compiler Errors"
 title: "Compiler messages"
-ms.date: 04/27/2021
+ms.date: 05/21/2024
 helpviewer_keywords: 
   - "C# language, compiler errors"
   - "Visual C# compiler, errors"
diff --git a/docs/csharp/language-reference/compiler-messages/params-arrays.md b/docs/csharp/language-reference/compiler-messages/params-arrays.md
new file mode 100644
index 0000000000000..4c629ff1b2390
--- /dev/null
+++ b/docs/csharp/language-reference/compiler-messages/params-arrays.md
@@ -0,0 +1,142 @@
+---
+title: Errors and warnings related to `params` arrays
+description: This article helps you diagnose and correct compiler errors and warnings when you use the `params` modifier on method parameters.
+f1_keywords:
+  - "CS0225"
+  - "CS0231"
+  - "CS0466"
+  - "CS0674"
+  - "CS0758"
+  - "CS1104"
+  - "CS1611"
+  - "CS1670"
+  - "CS1751"
+  - "CS9218"
+  - "CS9219"
+  - "CS9220"
+  - "CS9221"
+  - "CS9222"
+  - "CS9223"
+  - "CS9224"
+  - "CS9225"
+  - "CS9227"
+  - "CS9228"
+helpviewer_keywords:
+  - "CS0225"
+  - "CS0231"
+  - "CS0466"
+  - "CS0674"
+  - "CS0758"
+  - "CS1104"
+  - "CS1611"
+  - "CS1670"
+  - "CS1751"
+  - "CS9218"
+  - "CS9219"
+  - "CS9220"
+  - "CS9221"
+  - "CS9222"
+  - "CS9223"
+  - "CS9224"
+  - "CS9225"
+  - "CS9227"
+  - "CS9228"
+ms.date: 05/20/2024
+---
+# Errors and warnings related to the `params` modifier on method parameters
+
+There are a few *errors* related to the `lock` statement and thread synchronization:
+
+<!-- The text in this list generates issues for Acrolinx, because they don't use contractions.
+That's by design. The text closely matches the text of the compiler error / warning for SEO purposes.
+ -->
+- [**CS0225**](#parameter-and-argument-type-rules): *The params parameter must be a single-dimensional array or have a valid collection type*
+- [**CS0231**](#method-declaration-rules): *A params parameter must be the last parameter in a formal parameter list.*
+- [**CS0466**](#other-params-errors): *'method1' should not have a params parameter since 'method2' does not*
+- [**CS0674**](#other-params-errors): *Do not use `System.ParamArrayAttribute` or `System.ParamArrayAttribute`/`System.Runtime.CompilerServices.ParamCollectionAttribute`. Use the `params` keyword instead.*
+- [**CS0758**](#other-params-errors): *Both partial method declarations must use a `params` parameter or neither may use a `params` parameter*
+- [**CS1104**](#method-declaration-rules): *A parameter array cannot be used with `this` modifier on an extension method.*
+- [**CS1611**](#method-declaration-rules): *The params parameter cannot be declared as in `ref` or `out`*
+- [**CS1670**](#method-declaration-rules): *`params` is not valid in this context*
+- [**CS1751**](#method-declaration-rules): *Cannot specify a default value for a parameter array.*
+- [**CS9218**](#parameter-and-argument-type-rules): *The type arguments for method cannot be inferred from the usage because an argument with dynamic type is used and the method has a non-array params collection parameter. Try specifying the type arguments explicitly.*
+- [**CS9219**](#parameter-and-argument-type-rules): *Ambiguity between expanded and normal forms of non-array params collection parameter of, the only corresponding argument has the type `dynamic`. Consider casting the dynamic argument.*
+- [**CS9223**](#other-params-errors): *Creation of params collection results in an infinite chain of invocation of constructor.*
+- [**CS9224**](#other-params-errors): *Method cannot be less visible than the member with params collection.*
+- [**CS9225**](#other-params-errors): *Constructor leaves required member uninitialized.*
+- [**CS9227**](#parameter-and-argument-type-rules): *Type does not contain a definition for a suitable instance `Add` method.*
+- [**CS9228**](#parameter-and-argument-type-rules): *Non-array params collection type must have an applicable constructor that can be called with no arguments.*
+
+In addition, the compiler might produce the following *warning* related to the `params` modifier on method parameters:
+
+- [**CS9220**](#parameter-and-argument-type-rules): *One or more overloads of method having non-array params collection parameter might be applicable only in expanded form which is not supported during dynamic dispatch.*
+- [**CS9221**](#parameter-and-argument-type-rules): *One or more indexer overloads having non-array params collection parameter might be applicable only in expanded form which is not supported during dynamic dispatch.*
+- [**CS9222**](#parameter-and-argument-type-rules): *One or more constructor overloads having non-array params collection parameter might be applicable only in expanded form which is not supported during dynamic dispatch.*
+
+## Method declaration rules
+
+The following errors indicate using a `params` modifier on a parameter when the `params` modifier isn't allowed in that context:
+
+- **CS0231**: *A params parameter must be the last parameter in a formal parameter list.*
+- **CS1104**: *A parameter array cannot be used with `this` modifier on an extension method.*
+- **CS1611**: *The params parameter cannot be declared as in `ref` or `out`*
+- **CS1670**: *`params` is not valid in this context*
+- **CS1751**: *Cannot specify a default value for a parameter array.*
+
+The compiler enforces the following rules on your use of the `params` modifier on a method parameter:
+
+- The `params` modifier is allowed only on the last parameter in a formal parameter list. This includes any parameters with a default value.
+- You can't include a default argument for the parameter when the `params` modifier is used.
+- The `params` modifier can't be applied to reference parameter. A reference parameter is one with the `in`, `ref readonly`, `ref` or `out` modifier.
+- The `params` modifier can't be combined with the `this` modifier on an extension method.
+- The `params` modifier can't be used on an overloaded operator.
+
+In versions before C# 12, the `params` modifier can't be used on the parameter of an anonymous method or lambda expression.
+
+## Parameter and argument type rules
+
+The following errors indicate that the type of the parameter used with `params` is invalid:
+
+- **CS9218**: *The type arguments for method cannot be inferred from the usage because an argument with dynamic type is used and the method has a non-array params collection parameter. Try specifying the type arguments explicitly.*
+- **CS9219**: *Ambiguity between expanded and normal forms of non-array params collection parameter of, the only corresponding argument has the type 'dynamic'. Consider casting the dynamic argument.*
+- **CS0225**: *The params parameter must be a single-dimensional array or have a valid collection type*
+- **CS9227**: *Type does not contain a definition for a suitable instance `Add` method.*
+- **CS9228**: *Non-array params collection type must have an applicable constructor that can be called with no arguments.*
+
+The following warnings indicate that the one of the possible overloads might involve dynamic dispatch. The dynamic nature of the argument doesn't participate in overload resolution.
+
+- **CS9220**: *One or more overloads of method having non-array params collection parameter might be applicable only in expanded form which is not supported during dynamic dispatch.*
+- **CS9221**: *One or more indexer overloads having non-array params collection parameter might be applicable only in expanded form which is not supported during dynamic dispatch.*
+- **CS9222**: *One or more constructor overloads having non-array params collection parameter might be applicable only in expanded form which is not supported during dynamic dispatch.*
+
+In versions before C# 13, the `params` modifier is allowed on single-dimensional arrays only. No other types were valid.
+
+Starting with C# 13 any valid collection type can be used. However, some restrictions remain. The collection type must follow the same rules as the target of a [collection expression](../operators/collection-expressions.md#conversions).
+
+## Other params errors
+
+The following errors indicate other issues with using the `params` modifier:
+
+- **CS0466**: *'method1' should not have a params parameter since 'method2' does not*
+- **CS0674**: *Do not use `System.ParamArrayAttribute` or `System.Runtime.CompilerServices.ParamCollectionAttribute`. Use the `params` keyword instead.*
+- **CS0758**: *Both partial method declarations must use a `params` parameter or neither may use a `params` parameter*
+- **CS9223**: *Creation of params collection results in an infinite chain of invocation of constructor.*
+- **CS9224**: *Method cannot be less visible than the member with params collection.*
+- **CS9225**: *Constructor leaves required member uninitialized.*
+
+A method that implements an interface must include the `params` modifier if and only if the interface member has the `params` modifier. Similarly, either both declarations of a `partial` method must include the `params` modifier, or none can include the `params` modifier.
+
+You must use the `params` modifier. You can't apply the equivalent attributes, either <xref:System.ParamArrayAttribute?displayProperty=nameWithType> or <xref:System.Runtime.CompilerServices.ParamCollectionAttribute?displayProperty=nameWithType>.
+
+The compiler generates one of the final three errors in the preceding list when the code generated to create the collection type is invalid:
+
+- The compiler emits **CS9223** when the code emitted to create the collection also contains a params collection of the same type. Typically, the `Add` method takes a `params` collection of the same type.
+- The compiler emits **CS9224** when the `Create` method for the collection type is less accessible than the method that takes the `params` parameter of the collection type.
+- The compiler emits **CS9225** when the collection type has a required member and the parameterless constructor doesn't initialize that member and have the <xref:System.Diagnostics.CodeAnalysis.SetsRequiredMembersAttribute?displayProperty=nameWithType> on the parameterless constructor.
+
+## See also
+
+- [Extension Methods](../../programming-guide/classes-and-structs/extension-methods.md)
+- [Partial Classes and Methods](../../programming-guide/classes-and-structs/partial-classes-and-methods.md)
+- [Collection expressions](../operators/collection-expressions.md)
+- [params](../keywords/method-parameters.md#params-modifier)
diff --git a/docs/csharp/language-reference/toc.yml b/docs/csharp/language-reference/toc.yml
index 24ef9b1ba57ba..11e712f02b954 100644
--- a/docs/csharp/language-reference/toc.yml
+++ b/docs/csharp/language-reference/toc.yml
@@ -464,6 +464,11 @@ items:
       CS8351, CS8373, CS8374, CS8388, CS8977, CS9072, CS9077, CS9078, CS9079, CS9085, CS9086, CS9087, CS9089, CS9091, CS9092,
       CS9093, CS9094, CS9095, CS9096, CS9097, CS9101, CS9102, CS9104, CS9190, CS9191, CS9192, CS9193, CS9195, CS9196, CS9197,
       CS9198, CS9199, CS9200, CS9201
+  - name: Params modifier
+    href: ./compiler-messages/params-arrays.md
+    displayName: > 
+      CS0225, CS0231, CS0466, CS0674, CS0758, CS1104, CS1611, CS1670, CS1751, CS9218, CS9219, CS9220, CS9221, CS9222, CS9223,
+      CS9224, CS9225, CS9227, CS9228
   - name: Nullable warnings
     href: ./compiler-messages/nullable-warnings.md
     displayName: >
@@ -813,8 +818,6 @@ items:
       href: ../misc/cs0220.md
     - name: CS0221
       href: ../misc/cs0221.md
-    - name: CS0225
-      href: ../misc/cs0225.md
     - name: CS0226
       href: ../misc/cs0226.md
     - name: CS0227
@@ -825,8 +828,6 @@ items:
       href: ./compiler-messages/cs0229.md
     - name: CS0230
       href: ../misc/cs0230.md
-    - name: CS0231
-      href: ../misc/cs0231.md
     - name: CS0233
       href: ./compiler-messages/cs0233.md
     - name: CS0236
@@ -1007,8 +1008,6 @@ items:
       href: ../misc/cs0462.md
     - name: CS0463
       href: ../misc/cs0463.md
-    - name: CS0466
-      href: ../misc/cs0466.md
     - name: CS0468
       href: ../misc/cs0468.md
     - name: CS0470
@@ -1221,8 +1220,6 @@ items:
       href: ../misc/cs0670.md
     - name: CS0673
       href: ../misc/cs0673.md
-    - name: CS0674
-      href: ../misc/cs0674.md
     - name: CS0677
       href: ../misc/cs0677.md
     - name: CS0678
@@ -1341,8 +1338,6 @@ items:
       href: ../misc/cs0756.md
     - name: CS0757
       href: ../misc/cs0757.md
-    - name: CS0758
-      href: ../misc/cs0758.md
     - name: CS0759
       href: ../misc/cs0759.md
     - name: CS0761
@@ -1487,8 +1482,6 @@ items:
       href: ../misc/cs1102.md
     - name: CS1103
       href: ../misc/cs1103.md
-    - name: CS1104
-      href: ../misc/cs1104.md
     - name: CS1105
       href: ../misc/cs1105.md
     - name: CS1106
@@ -1641,8 +1634,6 @@ items:
       href: ../misc/cs1608.md
     - name: CS1609
       href: ../misc/cs1609.md
-    - name: CS1611
-      href: ../misc/cs1611.md
     - name: CS1612
       href: ./compiler-messages/cs1612.md
     - name: CS1613
@@ -1719,8 +1710,6 @@ items:
       href: ../misc/cs1666.md
     - name: CS1667
       href: ../misc/cs1667.md
-    - name: CS1670
-      href: ../misc/cs1670.md
     - name: CS1671
       href: ../misc/cs1671.md
     - name: CS1672
@@ -1789,8 +1778,6 @@ items:
       href: ./compiler-messages/cs1737.md
     - name: CS1750
       href: ./compiler-messages/cs1750.md
-    - name: CS1751
-      href: ./compiler-messages/cs1751.md
     - name: CS1763
       href: ./compiler-messages/cs1763.md
     - name: CS1900
diff --git a/docs/csharp/misc/cs0225.md b/docs/csharp/misc/cs0225.md
deleted file mode 100644
index 861e2da59d592..0000000000000
--- a/docs/csharp/misc/cs0225.md
+++ /dev/null
@@ -1,36 +0,0 @@
----
-description: "Compiler Error CS0225"
-title: "Compiler Error CS0225"
-ms.date: 07/20/2015
-f1_keywords: 
-  - "CS0225"
-helpviewer_keywords: 
-  - "CS0225"
-ms.assetid: 0b0cd72b-c47a-44d1-9b27-d1a1fad06807
----
-# Compiler Error CS0225
-
-The params parameter must be a single-dimensional array or collection
-  
- When using the [params](../language-reference/keywords/method-parameters.md#params-modifier) keyword, you must specify a single-dimensional array or collection of the data type. For more information, see [Methods](../programming-guide/classes-and-structs/methods.md).  
-  
-## Example  
-
- The following sample generates CS0225:  
-  
-```csharp  
-// CS0225.cs  
-public class MyClass  
-{  
-    public static void TestParams(params int a)   // CS0225  
-    // try the following line instead  
-    // public static void TestParams(params int[] a)  
-    {  
-    }  
-  
-    public static void Main()  
-    {  
-        TestParams(1);  
-    }  
-}  
-```
diff --git a/docs/csharp/misc/cs0231.md b/docs/csharp/misc/cs0231.md
deleted file mode 100644
index 8fac462824607..0000000000000
--- a/docs/csharp/misc/cs0231.md
+++ /dev/null
@@ -1,31 +0,0 @@
----
-description: "Compiler Error CS0231"
-title: "Compiler Error CS0231"
-ms.date: 07/20/2015
-f1_keywords: 
-  - "CS0231"
-helpviewer_keywords: 
-  - "CS0231"
-ms.assetid: e5e6a8e1-6c9f-4a88-8935-7bedfba88f8c
----
-# Compiler Error CS0231
-
-A params parameter must be the last parameter in a formal parameter list.  
-  
- The [params](../language-reference/keywords/method-parameters.md#params-modifier) parameter supports a variable number of arguments and must be after all other parameters. For more information, see [Methods](../programming-guide/classes-and-structs/methods.md).  
-  
- The following sample generates CS0231:  
-  
-```csharp  
-// CS0231.cs  
-class Test  
-{  
-   public void TestMethod(params int[] p, int i) {} // CS0231  
-   // To resolve the error, use the following line instead:  
-   // public void TestMethod(int i, params int[] p) {}
-  
-   static void Main()
-   {  
-   }  
-}  
-```
diff --git a/docs/csharp/misc/cs0466.md b/docs/csharp/misc/cs0466.md
deleted file mode 100644
index 9f018db144728..0000000000000
--- a/docs/csharp/misc/cs0466.md
+++ /dev/null
@@ -1,43 +0,0 @@
----
-description: "Compiler Error CS0466"
-title: "Compiler Error CS0466"
-ms.date: 07/20/2015
-f1_keywords: 
-  - "CS0466"
-helpviewer_keywords: 
-  - "CS0466"
-ms.assetid: db6be72b-120a-4b48-b41c-a738d02adae0
----
-# Compiler Error CS0466
-
-'method1' should not have a params parameter since 'method2' does not  
-  
- You cannot use `params` parameter on a class member if the implemented interface doesn't use it.  
-  
-## Example  
-
- The following sample generates CS0466.  
-  
-```csharp  
-// CS0466.cs  
-interface I  
-{  
-   void F1(params int[] a);  
-   void F2(int[] a);  
-}  
-  
-class C : I  
-{  
-   void I.F1(params int[] a) {}  
-   void I.F2(params int[] a) {}   // CS0466  
-   void I.F2(int[] a) {}   // OK  
-  
-   public static void Main()  
-   {  
-      I i = (I) new C();  
-  
-      i.F1(new int[] {1, 2} );  
-      i.F2(new int[] {1, 2} );  
-   }  
-}  
-```
diff --git a/docs/csharp/misc/cs0674.md b/docs/csharp/misc/cs0674.md
deleted file mode 100644
index a906ee62c0591..0000000000000
--- a/docs/csharp/misc/cs0674.md
+++ /dev/null
@@ -1,39 +0,0 @@
----
-description: "Compiler Error CS0674"
-title: "Compiler Error CS0674"
-ms.date: 07/20/2015
-f1_keywords: 
-  - "CS0674"
-helpviewer_keywords: 
-  - "CS0674"
-ms.assetid: 9ebfac30-6de8-4503-b4f0-d79f7398e3d5
----
-# Compiler Error CS0674
-
-Do not use 'System.ParamArrayAttribute'. Use the 'params' keyword instead.  
-  
- The C# compiler does not allow for the use of <xref:System.ParamArrayAttribute?displayProperty=nameWithType>; use [params](../language-reference/keywords/method-parameters.md#params-modifier) instead.  
-  
- The following sample generates CS0674:  
-  
-```csharp  
-// CS0674.cs  
-using System;  
-public class MyClass
-{  
-  
-   public static void UseParams([ParamArray] int[] list)   // CS0674  
-   // try the following line instead  
-   // public static void UseParams(params int[] list)
-   {  
-      for ( int i = 0 ; i < list.Length ; i++ )  
-         Console.WriteLine(list[i]);  
-      Console.WriteLine();  
-   }  
-  
-   public static void Main()
-   {  
-      UseParams(1, 2, 3);  
-   }  
-}  
-```
diff --git a/docs/csharp/misc/cs0758.md b/docs/csharp/misc/cs0758.md
deleted file mode 100644
index 509543eed73c5..0000000000000
--- a/docs/csharp/misc/cs0758.md
+++ /dev/null
@@ -1,46 +0,0 @@
----
-description: "Compiler Error CS0758"
-title: "Compiler Error CS0758"
-ms.date: 07/20/2015
-f1_keywords: 
-  - "CS0758"
-helpviewer_keywords: 
-  - "CS0758"
-ms.assetid: 06ddd548-1311-40db-9078-8a18107b8346
----
-# Compiler Error CS0758
-
-Both partial method declarations must use a params parameter or neither may use a params parameter  
-  
- If one part of a partial method specifies a `params` parameter, the other part must specify one also.  
-  
-## To correct this error  
-  
-1. Either add the `params` modifier in one part of the method, or remove it in the other.  
-  
-## Example  
-
- The following code generates CS0758:  
-  
-```csharp  
-using System;  
-  
-    public partial class C  
-    {  
-        partial void Part(int i, params char[] array);  
-        partial void Part(int i, char[] array) // CS0758  
-        {  
-        }  
-  
-        public static int Main()  
-        {  
-            return 1;  
-        }  
-  
-    }  
-```  
-  
-## See also
-
-- [Partial Classes and Methods](../programming-guide/classes-and-structs/partial-classes-and-methods.md)
-- [params](../language-reference/keywords/method-parameters.md#params-modifier)
diff --git a/docs/csharp/misc/cs1104.md b/docs/csharp/misc/cs1104.md
deleted file mode 100644
index 63cfec3b8e61f..0000000000000
--- a/docs/csharp/misc/cs1104.md
+++ /dev/null
@@ -1,37 +0,0 @@
----
-description: "Compiler Error CS1104"
-title: "Compiler Error CS1104"
-ms.date: 07/20/2015
-f1_keywords: 
-  - "CS1104"
-helpviewer_keywords: 
-  - "CS1104"
-ms.assetid: 65bfe85f-8dd1-4aed-bcd1-1f7e0635868c
----
-# Compiler Error CS1104
-
-A parameter array cannot be used with 'this' modifier on an extension method.  
-  
- The first parameter of an extension method cannot be a params array.  
-  
-## To correct this error  
-  
-1. Remember that the first parameter of an extension method definition specifies which type the method will "extend". It is not an input parameter. Therefore, it makes no sense to have a params array in this location. If you do have to pass in a params array, make it the second parameter.  
-  
-## Example  
-
- The following example generates CS1104:  
-  
-```csharp  
-// cs1104.cs  
-// Compile with: /target:library  
-public static class Extensions  
-{  
-    public static void Test<T>(this params T[] tArr) {} // CS1104  
-}
-```  
-  
-## See also
-
-- [Extension Methods](../programming-guide/classes-and-structs/extension-methods.md)
-- [params](../language-reference/keywords/method-parameters.md#params-modifier)
diff --git a/docs/csharp/misc/cs1611.md b/docs/csharp/misc/cs1611.md
deleted file mode 100644
index 404a31b87a599..0000000000000
--- a/docs/csharp/misc/cs1611.md
+++ /dev/null
@@ -1,32 +0,0 @@
----
-description: "Compiler Error CS1611"
-title: "Compiler Error CS1611"
-ms.date: 07/20/2015
-f1_keywords: 
-  - "CS1611"
-helpviewer_keywords: 
-  - "CS1611"
-ms.assetid: 48bfba77-6be2-4242-b1d2-98bf471b6d1e
----
-# Compiler Error CS1611
-
-The params parameter cannot be declared as in ref or out  
-  
- The keywords [in](../language-reference/keywords/method-parameters.md#in-parameter-modifier), [ref](../language-reference/keywords/ref.md) or [out](../language-reference/keywords/method-parameters.md#out-parameter-modifier) cannot be used with the [params](../language-reference/keywords/method-parameters.md#params-modifier) keyword.  
-  
- The following sample generates CS1611:  
-  
-```csharp  
-// CS1611.cs  
-public class MyClass  
-{  
-   public static void Test(params ref int[] a)   // CS1611, remove ref  
-   {  
-   }  
-  
-   public static void Main()  
-   {  
-      Test(1);  
-   }  
-}  
-```
diff --git a/docs/csharp/misc/cs1670.md b/docs/csharp/misc/cs1670.md
deleted file mode 100644
index 5fb4bf633da47..0000000000000
--- a/docs/csharp/misc/cs1670.md
+++ /dev/null
@@ -1,38 +0,0 @@
----
-description: "Learn more about: Compiler Error CS1670"
-title: "Compiler Error CS1670"
-ms.date: 07/20/2015
-f1_keywords: 
-  - "CS1670"
-helpviewer_keywords: 
-  - "CS1670"
-ms.assetid: ee2507e5-b509-4af3-a15e-2c1f2da7159c
----
-# Compiler Error CS1670
-
-params is not valid in this context  
-  
- A number of C# features are incompatible with variable argument lists, and do not allow the `params` keyword, including the following:  
-  
-- Parameter lists of anonymous methods  
-  
-- Overloaded operators  
-  
-## Example  
-
- The following sample generates CS1670:  
-  
-```csharp  
-// CS1670.cs  
-public class C  
-{  
-    public bool operator +(params int[] paramsList)  // CS1670  
-    {  
-        return false;  
-    }  
-  
-    static void Main()  
-    {  
-    }  
-}  
-```