Add parameterless constructors to value converters

src/EFCore/Storage/ValueConversion/BoolToZeroOneConverter.cs

@@ -10,14 +10,22 @@ namespace Microsoft.EntityFrameworkCore.Storage.ValueConversion
     /// </summary>
     public class BoolToZeroOneConverter<TProvider> : BoolToTwoValuesConverter<TProvider>
     {
+        /// <summary>
+        ///     Creates a new instance of this converter. This converter preserves order.
+        /// </summary>
+        public BoolToZeroOneConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter. This converter preserves order.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public BoolToZeroOneConverter(ConverterMappingHints? mappingHints = null)
+        public BoolToZeroOneConverter(ConverterMappingHints? mappingHints)
             : base(Zero(), One(), null, mappingHints)
         {
         }

src/EFCore/Storage/ValueConversion/BytesToStringConverter.cs

@@ -10,15 +10,22 @@ namespace Microsoft.EntityFrameworkCore.Storage.ValueConversion
     /// </summary>
     public class BytesToStringConverter : ValueConverter<byte[]?, string?>
     {
+        /// <summary>
+        ///     Creates a new instance of this converter.
+        /// </summary>
+        public BytesToStringConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public BytesToStringConverter(
-            ConverterMappingHints? mappingHints = null)
+        public BytesToStringConverter(ConverterMappingHints? mappingHints)
             : base(
                 v => v == null ? null : Convert.ToBase64String(v),
                 v => v == null ? null : Convert.FromBase64String(v),

src/EFCore/Storage/ValueConversion/CharToStringConverter.cs

@@ -12,14 +12,22 @@ public class CharToStringConverter : StringCharConverter<char, string>
     {
         private static readonly ConverterMappingHints _defaultHints = new(size: 1);
 
+        /// <summary>
+        ///     Creates a new instance of this converter. This converter preserves order.
+        /// </summary>
+        public CharToStringConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter. This converter preserves order.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public CharToStringConverter(ConverterMappingHints? mappingHints = null)
+        public CharToStringConverter(ConverterMappingHints? mappingHints)
             : base(
                 ToString(),
                 ToChar(),

src/EFCore/Storage/ValueConversion/DateTimeOffsetToBinaryConverter.cs

@@ -11,14 +11,22 @@ namespace Microsoft.EntityFrameworkCore.Storage.ValueConversion
     /// </summary>
     public class DateTimeOffsetToBinaryConverter : ValueConverter<DateTimeOffset, long>
     {
+        /// <summary>
+        ///     Creates a new instance of this converter.
+        /// </summary>
+        public DateTimeOffsetToBinaryConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public DateTimeOffsetToBinaryConverter(ConverterMappingHints? mappingHints = null)
+        public DateTimeOffsetToBinaryConverter(ConverterMappingHints? mappingHints)
             : base(
                 v => ((v.Ticks / 1000) << 11) | ((long)v.Offset.TotalMinutes & 0x7FF),
                 v => new DateTimeOffset(

src/EFCore/Storage/ValueConversion/DateTimeOffsetToBytesConverter.cs

@@ -15,14 +15,22 @@ public class DateTimeOffsetToBytesConverter : ValueConverter<DateTimeOffset, byt
         private static readonly NumberToBytesConverter<long> _longToBytes = new();
         private static readonly NumberToBytesConverter<short> _shortToBytes = new();
 
+        /// <summary>
+        ///     Creates a new instance of this converter.
+        /// </summary>
+        public DateTimeOffsetToBytesConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public DateTimeOffsetToBytesConverter(ConverterMappingHints? mappingHints = null)
+        public DateTimeOffsetToBytesConverter(ConverterMappingHints? mappingHints)
             : base(
                 v => ToBytes(v),
                 v => FromBytes(v),

src/EFCore/Storage/ValueConversion/DateTimeOffsetToStringConverter.cs

@@ -11,14 +11,22 @@ namespace Microsoft.EntityFrameworkCore.Storage.ValueConversion
     /// </summary>
     public class DateTimeOffsetToStringConverter : StringDateTimeOffsetConverter<DateTimeOffset, string>
     {
+        /// <summary>
+        ///     Creates a new instance of this converter.
+        /// </summary>
+        public DateTimeOffsetToStringConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public DateTimeOffsetToStringConverter(ConverterMappingHints? mappingHints = null)
+        public DateTimeOffsetToStringConverter(ConverterMappingHints? mappingHints)
             : base(
                 ToString(),
                 ToDateTimeOffset(),

src/EFCore/Storage/ValueConversion/DateTimeToBinaryConverter.cs

@@ -11,14 +11,22 @@ namespace Microsoft.EntityFrameworkCore.Storage.ValueConversion
     /// </summary>
     public class DateTimeToBinaryConverter : ValueConverter<DateTime, long>
     {
+        /// <summary>
+        ///     Creates a new instance of this converter.
+        /// </summary>
+        public DateTimeToBinaryConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public DateTimeToBinaryConverter(ConverterMappingHints? mappingHints = null)
+        public DateTimeToBinaryConverter(ConverterMappingHints? mappingHints)
             : base(
                 v => v.ToBinary(),
                 v => DateTime.FromBinary(v),

src/EFCore/Storage/ValueConversion/DateTimeToStringConverter.cs

@@ -11,14 +11,22 @@ namespace Microsoft.EntityFrameworkCore.Storage.ValueConversion
     /// </summary>
     public class DateTimeToStringConverter : StringDateTimeConverter<DateTime, string>
     {
+        /// <summary>
+        ///     Creates a new instance of this converter.
+        /// </summary>
+        public DateTimeToStringConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public DateTimeToStringConverter(ConverterMappingHints? mappingHints = null)
+        public DateTimeToStringConverter(ConverterMappingHints? mappingHints)
             : base(
                 ToString(),
                 ToDateTime(),

src/EFCore/Storage/ValueConversion/DateTimeToTicksConverter.cs

@@ -10,14 +10,22 @@ namespace Microsoft.EntityFrameworkCore.Storage.ValueConversion
     /// </summary>
     public class DateTimeToTicksConverter : ValueConverter<DateTime, long>
     {
+        /// <summary>
+        ///     Creates a new instance of this converter.
+        /// </summary>
+        public DateTimeToTicksConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public DateTimeToTicksConverter(ConverterMappingHints? mappingHints = null)
+        public DateTimeToTicksConverter(ConverterMappingHints? mappingHints)
             : base(
                 v => v.Ticks,
                 v => new DateTime(v),

src/EFCore/Storage/ValueConversion/EnumToNumberConverter.cs

@@ -28,14 +28,22 @@ public class EnumToNumberConverter<TEnum, TNumber> : ValueConverter<TEnum, TNumb
                     : default;
         }
 
+        /// <summary>
+        ///     Creates a new instance of this converter. This converter preserves order.
+        /// </summary>
+        public EnumToNumberConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter. This converter preserves order.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public EnumToNumberConverter(ConverterMappingHints? mappingHints = null)
+        public EnumToNumberConverter(ConverterMappingHints? mappingHints)
             : base(
                 ToNumber(),
                 ToEnum(),

src/EFCore/Storage/ValueConversion/EnumToStringConverter.cs

@@ -11,14 +11,22 @@ namespace Microsoft.EntityFrameworkCore.Storage.ValueConversion
     public class EnumToStringConverter<TEnum> : StringEnumConverter<TEnum, string, TEnum>
         where TEnum : struct
     {
+        /// <summary>
+        ///     Creates a new instance of this converter. This converter does not preserve order.
+        /// </summary>
+        public EnumToStringConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter. This converter does not preserve order.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public EnumToStringConverter(ConverterMappingHints? mappingHints = null)
+        public EnumToStringConverter(ConverterMappingHints? mappingHints)
             : base(
                 ToString(),
                 ToEnum(),

src/EFCore/Storage/ValueConversion/GuidToBytesConverter.cs

@@ -14,6 +14,21 @@ public class GuidToBytesConverter : ValueConverter<Guid, byte[]>
         private static readonly ConverterMappingHints _defaultHints
             = new(size: 16, valueGeneratorFactory: (p, t) => new SequentialGuidValueGenerator());
 
+        /// <summary>
+        ///     <para>
+        ///         Creates a new instance of this converter.
+        ///     </para>
+        ///     <para>
+        ///         This converter does not preserve order because the ordering of bits in
+        ///         the standard binary representation of a GUID does not match the ordering
+        ///         in the standard string representation.
+        ///     </para>
+        /// </summary>
+        public GuidToBytesConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     <para>
         ///         Creates a new instance of this converter.
@@ -28,7 +43,7 @@ private static readonly ConverterMappingHints _defaultHints
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public GuidToBytesConverter(ConverterMappingHints? mappingHints = null)
+        public GuidToBytesConverter(ConverterMappingHints? mappingHints)
             : base(
                 v => v.ToByteArray(),
                 v => new Guid(v),

src/EFCore/Storage/ValueConversion/GuidToStringConverter.cs

@@ -12,14 +12,22 @@ namespace Microsoft.EntityFrameworkCore.Storage.ValueConversion
     /// </summary>
     public class GuidToStringConverter : StringGuidConverter<Guid, string>
     {
+        /// <summary>
+        ///     Creates a new instance of this converter.
+        /// </summary>
+        public GuidToStringConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public GuidToStringConverter(ConverterMappingHints? mappingHints = null)
+        public GuidToStringConverter(ConverterMappingHints? mappingHints)
             : base(
                 ToString(),
                 ToGuid(),

src/EFCore/Storage/ValueConversion/IPAddressToBytesConverter.cs

@@ -12,14 +12,22 @@ public class IPAddressToBytesConverter : ValueConverter<IPAddress?, byte[]?>
     {
         private static readonly ConverterMappingHints _defaultHints = new(size: 16);
 
+        /// <summary>
+        ///     Creates a new instance of this converter.
+        /// </summary>
+        public IPAddressToBytesConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public IPAddressToBytesConverter(ConverterMappingHints? mappingHints = null)
+        public IPAddressToBytesConverter(ConverterMappingHints? mappingHints)
             : base(
                 v => v == null ? default : v.GetAddressBytes(),
                 v => v == null ? default : new IPAddress(v),

src/EFCore/Storage/ValueConversion/IPAddressToStringConverter.cs

@@ -15,14 +15,22 @@ public class IPAddressToStringConverter : ValueConverter<IPAddress?, string?>
         // IPv4-mapped IPv6 addresses can go up to 45 bytes, e.g. 0000:0000:0000:0000:0000:ffff:192.168.1.1
         private static readonly ConverterMappingHints _defaultHints = new(size: 45);
 
+        /// <summary>
+        ///     Creates a new instance of this converter.
+        /// </summary>
+        public IPAddressToStringConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     Creates a new instance of this converter.
         /// </summary>
         /// <param name="mappingHints">
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public IPAddressToStringConverter(ConverterMappingHints? mappingHints = null)
+        public IPAddressToStringConverter(ConverterMappingHints? mappingHints)
             : base(
                 ToString(),
                 ToIPAddress(),

src/EFCore/Storage/ValueConversion/NumberToBytesConverter.cs

@@ -15,6 +15,22 @@ public class NumberToBytesConverter<TNumber> : ValueConverter<TNumber, byte[]>
         // ReSharper disable once StaticMemberInGenericType
         private static readonly ConverterMappingHints _defaultHints = new(size: GetByteCount());
 
+        /// <summary>
+        ///     <para>
+        ///         Creates a new instance of this converter.
+        ///     </para>
+        ///     <para>
+        ///         This converter supports <see cref="double" />, <see cref="float" />, <see cref="decimal" />,
+        ///         <see cref="int" />, <see cref="long" />, <see cref="short" />, <see cref="byte" />,
+        ///         <see cref="uint" />, <see cref="ulong" />, <see cref="ushort" />, <see cref="sbyte" />,
+        ///         and <see cref="char" />.
+        ///     </para>
+        /// </summary>
+        public NumberToBytesConverter()
+            : this(null)
+        {
+        }
+
         /// <summary>
         ///     <para>
         ///         Creates a new instance of this converter.
@@ -30,7 +46,7 @@ public class NumberToBytesConverter<TNumber> : ValueConverter<TNumber, byte[]>
         ///     Hints that can be used by the <see cref="ITypeMappingSource" /> to create data types with appropriate
         ///     facets for the converted data.
         /// </param>
-        public NumberToBytesConverter(ConverterMappingHints? mappingHints = null)
+        public NumberToBytesConverter(ConverterMappingHints? mappingHints)
             : base(ToBytes(), ToNumber(), _defaultHints.With(mappingHints))
         {
         }