How to implement a custom FilterInputType<> with ValueObjects

[dotnetcadet]

Scenario
I'm wanting to extend my ASP.NET Web API capabilities to include GraphQL and ran into an issue while starting down this path. The services I've implemented heavily uses DDD (Domain-Driven Design) to the point where properties don't necessarily use native runtime types (string, int, long, etc.,). There are a couple reasons for this, but mainly to push some of domain logic into the types themselves.

Below is a struct that is used quite a bit and an example above it of it's use. Granted the business logic has been removed it demonstrates the use case.

Issue:
When implementing custom filtering I am able to use most of the binary operators, but when I try to do a contains I get the error below. Is there a way around this?

"extensions": {
        "message": "Method 'Boolean Contains(System.String)' declared on type 'System.String' cannot be called with instance of type 'System.Nullable`1[MyPortal.Name]'",
        "stackTrace": "   at System.Linq.Expressions.Expression.ValidateCallInstanceType(Type instanceType, MethodInfo method)\r\n   at System.Linq.Expressions.Expression.ValidateMethodAndGetParameters(Expression instance, MethodInfo method)\r\n   at System.Linq.Expressions.Expression.Call(Expression instance, MethodInfo method, Expression arg0)\r\n   at System.Linq.Expressions.Expression.Call(Expression instance, MethodInfo method, IEnumerable`1 arguments)\r\n   at HotChocolate.Data.Filters.Expressions.FilterExpressionBuilder.Contains(Expression property, Object value)\r\n   at HotChocolate.Data.Filters.Expressions.QueryableStringContainsHandler.HandleOperation(QueryableFilterContext context, IFilterOperationField field, IValueNode value, Object parsedValue)\r\n   at HotChocolate.Data.Filters.Expressions.QueryableOperationHandlerBase.TryHandleOperation(QueryableFilterContext context, IFilterOperationField field, ObjectFieldNode node, Expression& result)\r\n   at HotChocolate.Data.Filters.FilterOperationHandler`2.TryHandleEnter(TContext context, IFilterField field, ObjectFieldNode node, ISyntaxVisitorAction& action)\r\n   at HotChocolate.Data.Filters.FilterVisitor`2.OnFieldEnter(TContext context, IFilterField field, ObjectFieldNode node)\r\n   at HotChocolate.Data.Filters.FilterVisitorBase`2.Enter(ObjectFieldNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxWalker`1.Enter(ISyntaxNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.Visit[TNode,TParent](TNode node, TParent parent, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.VisitChildren(ObjectValueNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.VisitChildren(ISyntaxNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.Visit[TNode,TParent](TNode node, TParent parent, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.VisitChildren(ObjectFieldNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.VisitChildren(ISyntaxNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.Visit[TNode,TParent](TNode node, TParent parent, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.VisitChildren(ObjectValueNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.VisitChildren(ISyntaxNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.Visit[TNode,TParent](TNode node, TParent parent, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.VisitChildren(ObjectFieldNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.VisitChildren(ISyntaxNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.Visit[TNode,TParent](TNode node, TParent parent, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.VisitChildren(ObjectValueNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.VisitChildren(ISyntaxNode node, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.Visit[TNode,TParent](TNode node, TParent parent, TContext context)\r\n   at HotChocolate.Language.Visitors.SyntaxVisitor`1.Visit(ISyntaxNode node, TContext context)\r\n   at HotChocolate.Data.Filters.Expressions.QueryableFilterProvider.<ConfigureField>g__VisitFilterArgumentExecutor|11_0(IValueNode valueNode, IFilterInputType filterInput, Boolean inMemory)\r\n   at HotChocolate.Data.Filters.Expressions.QueryableFilterProvider.<>c__DisplayClass15_0`1.<CreateApplicator>b__0(IResolverContext context, Object input)\r\n   at HotChocolate.Data.Filters.Expressions.QueryableFilterProvider.<>c__DisplayClass10_0`1.<<CreateExecutor>g__ExecuteAsync|1>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Types.Pagination.PagingMiddleware.InvokeAsync(IMiddlewareContext context)\r\n   at HotChocolate.Utilities.MiddlewareCompiler`1.ExpressionHelper.AwaitTaskHelper(Task task)\r\n   at HotChocolate.Authorization.AuthorizeMiddleware.InvokeAsync(IMiddlewareContext context)\r\n   at HotChocolate.Authorization.AuthorizeDirectiveType.<>c__DisplayClass3_0.<<CreateMiddleware>b__1>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Execution.Processing.Tasks.ResolverTask.ExecuteResolverPipelineAsync(CancellationToken cancellationToken)\r\n   at HotChocolate.Execution.Processing.Tasks.ResolverTask.TryExecuteAsync(CancellationToken cancellationToken)"
}

public class UserInfo {
   public Name? FirstName { get; set; }
   public Name? LastName { get; set; }
}

public readonly struct Name : IEquatable<Name>, IEnumerable<char>, IComparable<string?>
{
    public Name(string value)
    {
        Value = value;
    }
    public string Value { get; }
    public bool Equals(Name other)
    {
        return Value.Equals(other.Value);
    }

    #region Overloads
    public override string ToString()
    {
        return Value.ToString();
    }
    public override bool Equals(object? instance)
    {
        if (instance is Name name)
        {
            return Equals(name);
        }
        return false;
    }

    public override int GetHashCode()
    {
        return HashCode.Combine(Value, typeof(Name));
    }

    public IEnumerator<char> GetEnumerator()
    {
        return Value.GetEnumerator();
    }

    IEnumerator IEnumerable.GetEnumerator()
    {
        return GetEnumerator();
    }

    public int CompareTo(string? other)
    {
        return Value.CompareTo(other);
    }
    #endregion

    public bool Contains(string value)
    {
        return Value.Contains(value);
    }
    public bool Contains(string value, StringComparison comparison)
    {
        return Value.Contains(value, comparison);
    }

    #region Operators

    public static implicit operator string(Name value) => value.Value;

    public static implicit operator Name(string id) => new Name(id);
    public static bool operator ==(Name left, Name right) => left.Value == right.Value;
    public static bool operator !=(Name left, Name right) => left.Value != right.Value;
    public static bool operator ==(Name? left, Name? right) => left.HasValue && right.HasValue && left.Value == right.Value;
    public static bool operator !=(Name? left, Name? right) => left.HasValue && right.HasValue && left.Value != right.Value;
    public static bool operator ==(Name left, Name? right) => right.HasValue && left.Value == right.Value;
    public static bool operator !=(Name left, Name? right) => right.HasValue && left.Value != right.Value;
    public static bool operator ==(Name? left, Name right) => left.HasValue && left.Value == right.Value;
    public static bool operator !=(Name? left, Name right) => left.HasValue && left.Value != right.Value;

    #endregion
}