Remove class constraint from Guaard.Is[Not]Null APIs

Author: Sergio0694

CommunityToolkit.Diagnostics/Guard.cs

@@ -24,7 +24,6 @@ public static partial class Guard
     /// <exception cref="ArgumentException">Thrown if <paramref name="value"/> is not <see langword="null"/>.</exception>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static void IsNull<T>(T? value, [CallerArgumentExpression("value")] string name = "")
-        where T : class
     {
         if (value is null)
         {
@@ -63,7 +62,6 @@ public static void IsNull<T>(T? value, [CallerArgumentExpression("value")] strin
     /// <exception cref="ArgumentNullException">Thrown if <paramref name="value"/> is <see langword="null"/>.</exception>
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     public static void IsNotNull<T>([NotNull] T? value, [CallerArgumentExpression("value")] string name = "")
-        where T : class
     {
         if (value is not null)
         {

CommunityToolkit.Diagnostics/Internals/Guard.ThrowHelper.cs

@@ -38,9 +38,8 @@ private static string AssertString(object? obj)
         /// <typeparam name="T">The type of the input value.</typeparam>
         [DoesNotReturn]
         public static void ThrowArgumentExceptionForIsNull<T>(T value, string name)
-            where T : class
         {
-            throw new ArgumentException($"Parameter {AssertString(name)} ({typeof(T).ToTypeString()}) must be null, was {AssertString(value)} ({value.GetType().ToTypeString()}).", name);
+            throw new ArgumentException($"Parameter {AssertString(name)} ({typeof(T).ToTypeString()}) must be null, was {AssertString(value)} ({value!.GetType().ToTypeString()}).", name);
         }
 
         /// <summary>