[API Implementation]: System.Diagnostics.CodeAnalysis.StringSyntaxAttribute

src/libraries/Microsoft.Extensions.Logging.Console/ref/Microsoft.Extensions.Logging.Console.cs

@@ -41,6 +41,7 @@ public partial class ConsoleFormatterOptions
     {
         public ConsoleFormatterOptions() { }
         public bool IncludeScopes { get { throw null; } set { } }
+        [System.Diagnostics.CodeAnalysis.StringSyntaxAttribute(System.Diagnostics.CodeAnalysis.StringSyntaxAttribute.DateTimeFormat)]
         public string TimestampFormat { get { throw null; } set { } }
         public bool UseUtcTimestamp { get { throw null; } set { } }
     }

src/libraries/Microsoft.Extensions.Logging.Console/ref/Microsoft.Extensions.Logging.Console.csproj

@@ -14,6 +14,10 @@
     <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\RequiresUnreferencedCodeAttribute.cs" />
   </ItemGroup>
 
+  <ItemGroup Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net7.0'))">
+    <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\StringSyntaxAttribute.cs" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="$(LibrariesProjectRoot)System.Text.Json\ref\System.Text.Json.csproj" />
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Extensions.Logging.Abstractions\ref\Microsoft.Extensions.Logging.Abstractions.csproj" />

src/libraries/Microsoft.Extensions.Logging.Console/src/ConsoleFormatterOptions.cs

@@ -2,6 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Text;
 
 namespace Microsoft.Extensions.Logging.Console
@@ -21,6 +22,7 @@ public ConsoleFormatterOptions() { }
         /// <summary>
         /// Gets or sets format string used to format timestamp in logging messages. Defaults to <c>null</c>.
         /// </summary>
+        [StringSyntax(StringSyntaxAttribute.DateTimeFormat)]
         public string TimestampFormat { get; set; }
 
         /// <summary>

src/libraries/Microsoft.Extensions.Logging.Console/src/Microsoft.Extensions.Logging.Console.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppMinimum);netstandard2.0;$(NetFrameworkMinimum)</TargetFrameworks>
@@ -38,6 +38,10 @@
     <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\RequiresUnreferencedCodeAttribute.cs" />
     <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\UnconditionalSuppressMessageAttribute.cs" />
   </ItemGroup>
+
+  <ItemGroup Condition="!$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net7.0'))">
+    <Compile Include="$(CoreLibSharedDir)System\Diagnostics\CodeAnalysis\StringSyntaxAttribute.cs" />
+  </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFrameworkIdentifier)' != '.NETCoreApp'">
     <ProjectReference Include="$(LibrariesProjectRoot)Microsoft.Bcl.AsyncInterfaces\src\Microsoft.Bcl.AsyncInterfaces.csproj" />
@@ -63,4 +67,4 @@
     <Reference Include="System.Runtime" />
   </ItemGroup>
 
-</Project>
+</Project>

src/libraries/System.ComponentModel.Annotations/ref/System.ComponentModel.Annotations.cs

@@ -235,7 +235,7 @@ public RangeAttribute([System.Diagnostics.CodeAnalysis.DynamicallyAccessedMember
     [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property, AllowMultiple=false)]
     public partial class RegularExpressionAttribute : System.ComponentModel.DataAnnotations.ValidationAttribute
     {
-        public RegularExpressionAttribute(string pattern) { }
+        public RegularExpressionAttribute([System.Diagnostics.CodeAnalysis.StringSyntaxAttribute(System.Diagnostics.CodeAnalysis.StringSyntaxAttribute.Regex)] string pattern) { }
         public int MatchTimeoutInMilliseconds { get { throw null; } set { } }
         public string Pattern { get { throw null; } }
         public override string FormatErrorMessage(string name) { throw null; }

src/libraries/System.ComponentModel.Annotations/src/System/ComponentModel/DataAnnotations/RegularExpressionAttribute.cs

@@ -1,6 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
+using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
 using System.Text.RegularExpressions;
 
@@ -17,7 +18,7 @@ public class RegularExpressionAttribute : ValidationAttribute
         ///     Constructor that accepts the regular expression pattern
         /// </summary>
         /// <param name="pattern">The regular expression to use.  It cannot be null.</param>
-        public RegularExpressionAttribute(string pattern)
+        public RegularExpressionAttribute([StringSyntax(StringSyntaxAttribute.Regex)] string pattern)
             : base(() => SR.RegexAttribute_ValidationError)
         {
             Pattern = pattern;

src/libraries/System.Net.WebProxy/ref/System.Net.WebProxy.cs

@@ -18,13 +18,13 @@ public WebProxy() { }
         protected WebProxy(System.Runtime.Serialization.SerializationInfo serializationInfo, System.Runtime.Serialization.StreamingContext streamingContext) { }
         public WebProxy(string? Address) { }
         public WebProxy(string? Address, bool BypassOnLocal) { }
-        public WebProxy(string? Address, bool BypassOnLocal, string[]? BypassList) { }
-        public WebProxy(string? Address, bool BypassOnLocal, string[]? BypassList, System.Net.ICredentials? Credentials) { }
+        public WebProxy(string? Address, bool BypassOnLocal, [System.Diagnostics.CodeAnalysis.StringSyntaxAttribute(System.Diagnostics.CodeAnalysis.StringSyntaxAttribute.Regex, System.Text.RegularExpressions.RegexOptions.IgnoreCase | System.Text.RegularExpressions.RegexOptions.CultureInvariant)] string[]? BypassList) { }
+        public WebProxy(string? Address, bool BypassOnLocal, [System.Diagnostics.CodeAnalysis.StringSyntaxAttribute(System.Diagnostics.CodeAnalysis.StringSyntaxAttribute.Regex, System.Text.RegularExpressions.RegexOptions.IgnoreCase | System.Text.RegularExpressions.RegexOptions.CultureInvariant)] string[]? BypassList, System.Net.ICredentials? Credentials) { }
         public WebProxy(string Host, int Port) { }
         public WebProxy(System.Uri? Address) { }
         public WebProxy(System.Uri? Address, bool BypassOnLocal) { }
-        public WebProxy(System.Uri? Address, bool BypassOnLocal, string[]? BypassList) { }
-        public WebProxy(System.Uri? Address, bool BypassOnLocal, string[]? BypassList, System.Net.ICredentials? Credentials) { }
+        public WebProxy(System.Uri? Address, bool BypassOnLocal, [System.Diagnostics.CodeAnalysis.StringSyntaxAttribute(System.Diagnostics.CodeAnalysis.StringSyntaxAttribute.Regex, System.Text.RegularExpressions.RegexOptions.IgnoreCase | System.Text.RegularExpressions.RegexOptions.CultureInvariant)] string[]? BypassList) { }
+        public WebProxy(System.Uri? Address, bool BypassOnLocal, [System.Diagnostics.CodeAnalysis.StringSyntaxAttribute(System.Diagnostics.CodeAnalysis.StringSyntaxAttribute.Regex, System.Text.RegularExpressions.RegexOptions.IgnoreCase | System.Text.RegularExpressions.RegexOptions.CultureInvariant)] string[]? BypassList, System.Net.ICredentials? Credentials) { }
         public System.Uri? Address { get { throw null; } set { } }
         public System.Collections.ArrayList BypassArrayList { get { throw null; } }
         [System.Diagnostics.CodeAnalysis.AllowNullAttribute]

src/libraries/System.Net.WebProxy/ref/System.Net.WebProxy.csproj

@@ -11,5 +11,6 @@
     <ProjectReference Include="..\..\System.Net.Primitives\ref\System.Net.Primitives.csproj" />
     <ProjectReference Include="..\..\System.Runtime\ref\System.Runtime.csproj" />
     <ProjectReference Include="..\..\System.Runtime.Extensions\ref\System.Runtime.Extensions.csproj" />
+    <ProjectReference Include="..\..\System.Text.RegularExpressions\ref\System.Text.RegularExpressions.csproj" />
   </ItemGroup>
-</Project>
+</Project>

src/libraries/System.Net.WebProxy/src/System/Net/WebProxy.cs

@@ -20,9 +20,9 @@ public WebProxy(Uri? Address) : this(Address, false, null, null) { }
 
         public WebProxy(Uri? Address, bool BypassOnLocal) : this(Address, BypassOnLocal, null, null) { }
 
-        public WebProxy(Uri? Address, bool BypassOnLocal, string[]? BypassList) : this(Address, BypassOnLocal, BypassList, null) { }
+        public WebProxy(Uri? Address, bool BypassOnLocal, [StringSyntax(StringSyntaxAttribute.Regex, RegexOptions.IgnoreCase | RegexOptions.CultureInvariant)] string[]? BypassList) : this(Address, BypassOnLocal, BypassList, null) { }
 
-        public WebProxy(Uri? Address, bool BypassOnLocal, string[]? BypassList, ICredentials? Credentials)
+        public WebProxy(Uri? Address, bool BypassOnLocal, [StringSyntax(StringSyntaxAttribute.Regex, RegexOptions.IgnoreCase | RegexOptions.CultureInvariant)] string[]? BypassList, ICredentials? Credentials)
         {
             this.Address = Address;
             this.Credentials = Credentials;
@@ -49,12 +49,12 @@ public WebProxy(string? Address, bool BypassOnLocal)
         {
         }
 
-        public WebProxy(string? Address, bool BypassOnLocal, string[]? BypassList)
+        public WebProxy(string? Address, bool BypassOnLocal, [StringSyntax(StringSyntaxAttribute.Regex, RegexOptions.IgnoreCase | RegexOptions.CultureInvariant)] string[]? BypassList)
             : this(CreateProxyUri(Address), BypassOnLocal, BypassList, null)
         {
         }
 
-        public WebProxy(string? Address, bool BypassOnLocal, string[]? BypassList, ICredentials? Credentials)
+        public WebProxy(string? Address, bool BypassOnLocal, [StringSyntax(StringSyntaxAttribute.Regex, RegexOptions.IgnoreCase | RegexOptions.CultureInvariant)] string[]? BypassList, ICredentials? Credentials)
             : this(CreateProxyUri(Address), BypassOnLocal, BypassList, Credentials)
         {
         }

src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems

@@ -57,8 +57,8 @@
     <Compile Include="$(MSBuildThisFileDirectory)Internal\Console.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Internal\Padding.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Internal\Runtime\CompilerServices\Unsafe.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)\Internal\Runtime\InteropServices\ComponentActivator.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)\Internal\Runtime\InteropServices\IsolatedComponentLoadContext.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Internal\Runtime\InteropServices\ComponentActivator.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Internal\Runtime\InteropServices\IsolatedComponentLoadContext.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Microsoft\Win32\SafeHandles\CriticalHandleMinusOneIsInvalid.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Microsoft\Win32\SafeHandles\CriticalHandleZeroOrMinusOneIsInvalid.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Microsoft\Win32\SafeHandles\SafeHandleMinusOneIsInvalid.cs" />
@@ -254,15 +254,16 @@
     <Compile Include="$(MSBuildThisFileDirectory)System\DefaultBinder.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Delegate.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\ConstantExpectedAttribute.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\RequiresAssemblyFilesAttribute.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\RequiresDynamicCodeAttribute.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\RequiresUnreferencedCodeAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\DynamicallyAccessedMemberTypes.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\DynamicallyAccessedMembersAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\DynamicDependencyAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\NullableAttributes.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\UnconditionalSuppressMessageAttribute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\RequiresAssemblyFilesAttribute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\RequiresDynamicCodeAttribute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\RequiresUnreferencedCodeAttribute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\StringSyntaxAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\SuppressMessageAttribute.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\CodeAnalysis\UnconditionalSuppressMessageAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\ConditionalAttribute.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\Contracts\ContractException.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\Contracts\ContractFailedEventArgs.cs" />

src/libraries/System.Private.CoreLib/src/System/DateTime.cs

@@ -1134,7 +1134,7 @@ public static DateTime Parse(ReadOnlySpan<char> s, IFormatProvider? provider = n
         // date and optionally a time in a culture-specific or universal format.
         // Leading and trailing whitespace characters are allowed.
         //
-        public static DateTime ParseExact(string s, string format, IFormatProvider? provider)
+        public static DateTime ParseExact(string s, [StringSyntax(StringSyntaxAttribute.DateTimeFormat)] string format, IFormatProvider? provider)
         {
             if (s == null) ThrowHelper.ThrowArgumentNullException(ExceptionArgument.s);
             if (format == null) ThrowHelper.ThrowArgumentNullException(ExceptionArgument.format);
@@ -1145,28 +1145,28 @@ public static DateTime ParseExact(string s, string format, IFormatProvider? prov
         // date and optionally a time in a culture-specific or universal format.
         // Leading and trailing whitespace characters are allowed.
         //
-        public static DateTime ParseExact(string s, string format, IFormatProvider? provider, DateTimeStyles style)
+        public static DateTime ParseExact(string s, [StringSyntax(StringSyntaxAttribute.DateTimeFormat)] string format, IFormatProvider? provider, DateTimeStyles style)
         {
             DateTimeFormatInfo.ValidateStyles(style);
             if (s == null) ThrowHelper.ThrowArgumentNullException(ExceptionArgument.s);
             if (format == null) ThrowHelper.ThrowArgumentNullException(ExceptionArgument.format);
             return DateTimeParse.ParseExact(s, format, DateTimeFormatInfo.GetInstance(provider), style);
         }
 
-        public static DateTime ParseExact(ReadOnlySpan<char> s, ReadOnlySpan<char> format, IFormatProvider? provider, DateTimeStyles style = DateTimeStyles.None)
+        public static DateTime ParseExact(ReadOnlySpan<char> s, [StringSyntax(StringSyntaxAttribute.DateTimeFormat)] ReadOnlySpan<char> format, IFormatProvider? provider, DateTimeStyles style = DateTimeStyles.None)
         {
             DateTimeFormatInfo.ValidateStyles(style);
             return DateTimeParse.ParseExact(s, format, DateTimeFormatInfo.GetInstance(provider), style);
         }
 
-        public static DateTime ParseExact(string s, string[] formats, IFormatProvider? provider, DateTimeStyles style)
+        public static DateTime ParseExact(string s, [StringSyntax(StringSyntaxAttribute.DateTimeFormat)] string[] formats, IFormatProvider? provider, DateTimeStyles style)
         {
             DateTimeFormatInfo.ValidateStyles(style);
             if (s == null) ThrowHelper.ThrowArgumentNullException(ExceptionArgument.s);
             return DateTimeParse.ParseExactMultiple(s, formats, DateTimeFormatInfo.GetInstance(provider), style);
         }
 
-        public static DateTime ParseExact(ReadOnlySpan<char> s, string[] formats, IFormatProvider? provider, DateTimeStyles style = DateTimeStyles.None)
+        public static DateTime ParseExact(ReadOnlySpan<char> s, [StringSyntax(StringSyntaxAttribute.DateTimeFormat)] string[] formats, IFormatProvider? provider, DateTimeStyles style = DateTimeStyles.None)
         {
             DateTimeFormatInfo.ValidateStyles(style);
             return DateTimeParse.ParseExactMultiple(s, formats, DateTimeFormatInfo.GetInstance(provider), style);
@@ -1282,7 +1282,7 @@ public override string ToString()
             return DateTimeFormat.Format(this, null, null);
         }
 
-        public string ToString(string? format)
+        public string ToString([StringSyntax(StringSyntaxAttribute.DateTimeFormat)] string? format)
         {
             return DateTimeFormat.Format(this, format, null);
         }
@@ -1292,12 +1292,12 @@ public string ToString(IFormatProvider? provider)
             return DateTimeFormat.Format(this, null, provider);
         }
 
-        public string ToString(string? format, IFormatProvider? provider)
+        public string ToString([StringSyntax(StringSyntaxAttribute.DateTimeFormat)] string? format, IFormatProvider? provider)
         {
             return DateTimeFormat.Format(this, format, provider);
         }
 
-        public bool TryFormat(Span<char> destination, out int charsWritten, ReadOnlySpan<char> format = default, IFormatProvider? provider = null) =>
+        public bool TryFormat(Span<char> destination, out int charsWritten, [StringSyntax(StringSyntaxAttribute.DateTimeFormat)] ReadOnlySpan<char> format = default, IFormatProvider? provider = null) =>
             DateTimeFormat.TryFormat(this, destination, out charsWritten, format, provider);
 
         public DateTime ToUniversalTime()
@@ -1339,7 +1339,7 @@ public static bool TryParse(ReadOnlySpan<char> s, IFormatProvider? provider, Dat
             return DateTimeParse.TryParse(s, DateTimeFormatInfo.GetInstance(provider), styles, out result);
         }
 
-        public static bool TryParseExact([NotNullWhen(true)] string? s, [NotNullWhen(true)] string? format, IFormatProvider? provider, DateTimeStyles style, out DateTime result)
+        public static bool TryParseExact([NotNullWhen(true)] string? s, [NotNullWhen(true), StringSyntax(StringSyntaxAttribute.DateTimeFormat)] string? format, IFormatProvider? provider, DateTimeStyles style, out DateTime result)
         {
             DateTimeFormatInfo.ValidateStyles(style);
 
@@ -1352,13 +1352,13 @@ public static bool TryParseExact([NotNullWhen(true)] string? s, [NotNullWhen(tru
             return DateTimeParse.TryParseExact(s, format, DateTimeFormatInfo.GetInstance(provider), style, out result);
         }
 
-        public static bool TryParseExact(ReadOnlySpan<char> s, ReadOnlySpan<char> format, IFormatProvider? provider, DateTimeStyles style, out DateTime result)
+        public static bool TryParseExact(ReadOnlySpan<char> s, [StringSyntax(StringSyntaxAttribute.DateTimeFormat)] ReadOnlySpan<char> format, IFormatProvider? provider, DateTimeStyles style, out DateTime result)
         {
             DateTimeFormatInfo.ValidateStyles(style);
             return DateTimeParse.TryParseExact(s, format, DateTimeFormatInfo.GetInstance(provider), style, out result);
         }
 
-        public static bool TryParseExact([NotNullWhen(true)] string? s, [NotNullWhen(true)] string?[]? formats, IFormatProvider? provider, DateTimeStyles style, out DateTime result)
+        public static bool TryParseExact([NotNullWhen(true)] string? s, [NotNullWhen(true), StringSyntax(StringSyntaxAttribute.DateTimeFormat)] string?[]? formats, IFormatProvider? provider, DateTimeStyles style, out DateTime result)
         {
             DateTimeFormatInfo.ValidateStyles(style);
 
@@ -1371,7 +1371,7 @@ public static bool TryParseExact([NotNullWhen(true)] string? s, [NotNullWhen(tru
             return DateTimeParse.TryParseExactMultiple(s, formats, DateTimeFormatInfo.GetInstance(provider), style, out result);
         }
 
-        public static bool TryParseExact(ReadOnlySpan<char> s, [NotNullWhen(true)] string?[]? formats, IFormatProvider? provider, DateTimeStyles style, out DateTime result)
+        public static bool TryParseExact(ReadOnlySpan<char> s, [NotNullWhen(true), StringSyntax(StringSyntaxAttribute.DateTimeFormat)] string?[]? formats, IFormatProvider? provider, DateTimeStyles style, out DateTime result)
         {
             DateTimeFormatInfo.ValidateStyles(style);
             return DateTimeParse.TryParseExactMultiple(s, formats, DateTimeFormatInfo.GetInstance(provider), style, out result);