System.AggregateException : One or more errors occurred. (The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.) ---- System.IO.IOException : The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.

The code doesn't compile. Test0.cs(7,13): error CS0012: The type 'ValueType' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. Test0.cs(8,9): error CS0012: The type 'ValueType' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. using System.Linq; class Test { public Test() { var list = new int[5]; _ = list.Last(); list.First(x=> x == 0); } }

The code doesn't compile. Test0.cs(11,28): error CS0234: The type or namespace name 'ConstructorArgumentAttribute' does not exist in the namespace 'System.Windows.Markup' (are you missing an assembly reference?) Test0.cs(11,28): error CS0234: The type or namespace name 'ConstructorArgument' does not exist in the namespace 'System.Windows.Markup' (are you missing an assembly reference?) public class MyExtension { public MyExtension() { } public MyExtension(object value1) { Value1 = value1; } [System.Windows.Markup.ConstructorArgument("value1")] public object Value1 { get; set; } }

The code doesn't compile. Test0.cs(11,28): error CS0234: The type or namespace name 'ConstructorArgumentAttribute' does not exist in the namespace 'System.Windows.Markup' (are you missing an assembly reference?) Test0.cs(11,28): error CS0234: The type or namespace name 'ConstructorArgument' does not exist in the namespace 'System.Windows.Markup' (are you missing an assembly reference?) public class MyExtension { public MyExtension() { } public MyExtension(object value1) { Value1 = value1; } [System.Windows.Markup.ConstructorArgument("value2")] public object Value1 { get; set; } }

System.AggregateException : One or more errors occurred. (The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.) ---- System.IO.IOException : The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.

System.AggregateException : One or more errors occurred. (The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.) ---- System.IO.IOException : The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.

System.AggregateException : One or more errors occurred. (The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.) ---- System.IO.IOException : The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.

System.AggregateException : One or more errors occurred. (The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.) ---- System.IO.IOException : The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.

System.AggregateException : One or more errors occurred. (The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.) ---- System.IO.IOException : The process cannot access the file 'C:\Users\runneradmin\AppData\Local\Meziantou.AnalyzerTests\ref\Microsoft.NETCore.App.Ref@5.0.0\mscorlib.dll' because it is being used by another process.