Cleanup.

src/MapTo/DiagnosticProvider.cs

@@ -23,7 +23,7 @@ namespace MapTo
             Create($"{ErrorId}030", location, "Type Mismatch", $"No matching properties found between '{classType.ToDisplayString()}' and '{sourceType.ToDisplayString()}' types.");
 
         internal static Diagnostic NoMatchingPropertyTypeFoundError(IPropertySymbol property) =>
-            Create($"{ErrorId}031", property.Locations.FirstOrDefault(), "Type Mismatch", $"Cannot create a map for '{property.ToDisplayString()}' property because source and destination types are not implicitly convertible. Consider using '{MapTypeConverterAttributeSource.FullyQualifiedName}' to provide a type converter or ignore the property using '{RootNamespace}.{IgnorePropertyAttributeSource.AttributeName}Attribute'.");
+            Create($"{ErrorId}031", property.Locations.FirstOrDefault(), "Type Mismatch", $"Cannot create a map for '{property.ToDisplayString()}' property because source and destination types are not implicitly convertible. Consider using '{MapTypeConverterAttributeSource.FullyQualifiedName}' to provide a type converter or ignore the property using '{IgnorePropertyAttributeSource.FullyQualifiedName}'.");
 
         internal static Diagnostic InvalidTypeConverterGenericTypesError(IPropertySymbol property, IPropertySymbol sourceProperty) =>
             Create($"{ErrorId}032", property.Locations.FirstOrDefault(), "Type Mismatch", $"Cannot map '{property.ToDisplayString()}' property because the annotated converter does not implement '{RootNamespace}.{TypeConverterSource.InterfaceName}<{sourceProperty.Type.ToDisplayString()}, {property.Type.ToDisplayString()}>'.");

src/MapTo/Sources/IgnorePropertyAttributeSource.cs

@@ -5,7 +5,8 @@ namespace MapTo.Sources
     internal static class IgnorePropertyAttributeSource
     {
         internal const string AttributeName = "IgnoreProperty";
-        internal const string FullyQualifiedName = RootNamespace + "." + AttributeName + "Attribute";
+        internal const string AttributeClassName = AttributeName + "Attribute";
+        internal const string FullyQualifiedName = RootNamespace + "." + AttributeClassName;
 
         internal static SourceCode Generate(SourceGenerationOptions options)
         {
@@ -26,10 +27,10 @@ namespace MapTo.Sources
 
             builder
                 .WriteLine("[AttributeUsage(AttributeTargets.Property, Inherited = false, AllowMultiple = false)]")
-                .WriteLine($"public sealed class {AttributeName}Attribute : Attribute {{ }}")
+                .WriteLine($"public sealed class {AttributeClassName} : Attribute {{ }}")
                 .WriteClosingBracket();
 
-            return new(builder.ToString(), $"{AttributeName}Attribute.g.cs");
+            return new(builder.ToString(), $"{AttributeClassName}.g.cs");
         }
     }
 }

src/MapTo/Sources/MapFromAttributeSource.cs

@@ -5,6 +5,8 @@ namespace MapTo.Sources
     internal static class MapFromAttributeSource
     {
         internal const string AttributeName = "MapFrom";
+        internal const string AttributeClassName = AttributeName + "Attribute";
+        internal const string FullyQualifiedName = RootNamespace + "." + AttributeClassName;
         
         internal static SourceCode Generate(SourceGenerationOptions options)
         {

src/MapTo/Sources/MapTypeConverterAttributeSource.cs

@@ -23,12 +23,12 @@ namespace MapTo.Sources
             {
                 builder
                     .WriteLine("/// <summary>")
-                    .WriteLine("/// Maps a property to property of another object.")
+                    .WriteLine("/// Specifies what type to use as a converter for the property this attribute is bound to.")
                     .WriteLine("/// </summary>");
             }
 
             builder
-                .WriteLine("[AttributeUsage(AttributeTargets.Property, AllowMultiple = true)]")
+                .WriteLine("[AttributeUsage(AttributeTargets.Property, AllowMultiple = false)]")
                 .WriteLine($"public sealed class {AttributeClassName} : Attribute")
                 .WriteOpeningBracket();
 
@@ -51,7 +51,7 @@ namespace MapTo.Sources
             {
                 builder
                     .WriteLine("/// <summary>")
-                    .WriteLine("/// Gets or sets the <see cref=\"ITypeConverter{TSource,TDestination}\" /> to be used to convert the source type.")
+                    .WriteLine($"/// Gets or sets the <see cref=\"{TypeConverterSource.InterfaceName}{{TSource,TDestination}}\" /> to be used to convert the source type.")
                     .WriteLine("/// </summary>");
             }
 

test/MapTo.Tests/Tests.cs

@@ -527,7 +527,7 @@ using System;
 
 namespace MapTo
 {{
-    [AttributeUsage(AttributeTargets.Property, AllowMultiple = true)]
+    [AttributeUsage(AttributeTargets.Property, AllowMultiple = false)]
     public sealed class MapTypeConverterAttribute : Attribute
     {{
         public MapTypeConverterAttribute(Type converter)

test/TestConsoleApp/ViewModels/UserViewModel.cs

@@ -10,7 +10,7 @@ namespace TestConsoleApp.ViewModels
         [IgnoreProperty]
         public string LastName { get; }
         
-        [MapProperty(Converter = typeof(LastNameConverter))]
+        [MapTypeConverter(typeof(LastNameConverter))]
         public string Key { get; }
 
         private class LastNameConverter : ITypeConverter<long, string>