Added new TextCaseType to TextCaseConverter

src/CommunityToolkit/Xamarin.CommunityToolkit.UnitTests/Converters/TextCaseConverter_Tests.cs

@@ -14,9 +14,12 @@ public class TextCaseConverter_Tests
 		[InlineData(test, TextCaseType.Lower, test)]
 		[InlineData(test, TextCaseType.Upper, "TEST")]
 		[InlineData(test, TextCaseType.None, test)]
+		[InlineData(test, TextCaseType.FirstUpperRestLower, "Test")]
 		[InlineData(t, TextCaseType.Upper, "T")]
 		[InlineData(t, TextCaseType.Lower, t)]
 		[InlineData(t, TextCaseType.None, t)]
+		[InlineData(t, TextCaseType.FirstUpperRestLower, "T")]
+		[InlineData("", TextCaseType.FirstUpperRestLower, "")]
 		[InlineData(null, null, null)]
 		public void TextCaseConverter(object value, object comparedValue, object expectedResult)
 		{

src/CommunityToolkit/Xamarin.CommunityToolkit/Converters/TextCaseConverter.shared.cs

@@ -37,6 +37,9 @@ object Convert(string value, object parameter)
 			{
 				TextCaseType.Lower => value?.ToLowerInvariant(),
 				TextCaseType.Upper => value?.ToUpperInvariant(),
+				TextCaseType.FirstUpperRestLower => !string.IsNullOrWhiteSpace(value) 
+					? value.Substring(0, 1).ToUpperInvariant() + value.Substring(1).ToLowerInvariant()
+					: value,
 				_ => value
 			};
 
@@ -55,4 +58,4 @@ TextCaseType GetParameter(object parameter)
 				_ => TextCaseType.None,
 			};
 	}
-}
+}

src/CommunityToolkit/Xamarin.CommunityToolkit/Converters/TextCaseType.shared.cs

@@ -8,5 +8,6 @@ public enum TextCaseType
 		None,
 		Upper,
 		Lower,
+		FirstUpperRestLower,
 	}
 }