Method WriteRefitMethod passes 'ReturnTypeMetadata' as the paramName argument to a ArgumentOutOfRangeException constructor. Replace this argument with one of the method's parameter names. Note that the provided parameter name should have the exact casing as declared on the method. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca2208)

In externally visible method 'INamedTypeSymbol WellKnownTypes.Get(Type type)', validate parameter 'type' is non-null before using it. If appropriate, throw an 'ArgumentNullException' when the argument is 'null'. (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1062)

Unused field 'TypeParameterVariableName' (https://learn.microsoft.com/dotnet/fundamentals/code-analysis/quality-rules/ca1823)

Missing XML comment for publicly visible type or member 'UniqueNameBuilder.UniqueNameBuilder()'

Missing XML comment for publicly visible type or member 'UniqueNameBuilder'

Missing XML comment for publicly visible type or member 'WellKnownTypes.TryGet(string)'

Missing XML comment for publicly visible type or member 'WellKnownTypes.Get(Type)'

Missing XML comment for publicly visible type or member 'WellKnownTypes.Get<T>()'

Missing XML comment for publicly visible type or member 'WellKnownTypes.WellKnownTypes(Compilation)'