Issue : SkipWhile Method not found in mono

[jogibear9988]

DynamicLinq Core does not work with mono atm.

Can we fix this? Method SkipWhile isnot found. Following methods exist in mono:

[jogibear9988]

System.TypeInitializationException: The type initializer for 'System.Linq.Dynamic.Core.DynamicQueryableExtensions' threw an exception. ---> System.Exception: Method not found: SkipWhile
at System.Linq.Dynamic.Core.DynamicQueryableExtensions.GetMethod (System.String name, System.Int32 parameterCount, System.Func`2[T,TResult] predicate) [0x00041] in F:\csharp\git\github\System.Linq.Dynamic.Core\src\System.Linq.Dynamic.Core\DynamicQueryableExtensions.cs:2019
at System.Linq.Dynamic.Core.DynamicQueryableExtensions..cctor () [0x00160] in F:\csharp\git\github\System.Linq.Dynamic.Core\src\System.Linq.Dynamic.Core\DynamicQueryableExtensions.cs:1638
--- End of inner exception stack trace ---

[jogibear9988]

This Code:

    private static MethodInfo GetMethod(string name, int parameterCount = 0, Func<MethodInfo, bool> predicate = null)
    {
        try
        {
            return typeof(Queryable).GetTypeInfo().GetDeclaredMethods(name).Single(mi =>
                mi.GetParameters().Length == parameterCount + 1 && (predicate == null || predicate(mi)));
        }
        catch (Exception ex)
        {
            var a = new StringBuilder();
            a.AppendLine("");
            a.AppendLine("Methods with Name:" + name);
            var mth = typeof(Queryable).GetTypeInfo().GetDeclaredMethods(name).Where(x => x.Name == name);
            a.AppendLine("Method Count" + mth.Count());
            foreach (var methodInfo in mth)
            {
                a.AppendLine(mth.ToString());
                foreach (var p in methodInfo.GetParameters())
                {
                    a.AppendLine(p.ToString());
                }
                a.AppendLine("--------------------");
            }

            throw new Exception(a.ToString());
            TraceSource.TraceEvent(TraceEventType.Error, 0, "Method not found:  {0} - {1}", name, ex);
        }

        return null;
    }

Produces following output:

Methods with Name:SkipWhile
Method Count2
System.Linq.Enumerable+WhereEnumerableIterator`1[System.Reflection.MethodInfo]
IQueryable`1 source
 predicate
--------------------
System.Linq.Enumerable+WhereEnumerableIterator`1[System.Reflection.MethodInfo]
IQueryable`1 source
 predicate
--------------------

[jogibear9988]

In Net 4.7.1. this is print out:

Methods with Name:SkipWhile
Method Count2
System.Linq.Enumerable+WhereEnumerableIterator`1[System.Reflection.MethodInfo]
System.Linq.IQueryable`1[TSource] source
System.Linq.Expressions.Expression`1[System.Func`2[TSource,System.Boolean]] predicate
--------------------
System.Linq.Enumerable+WhereEnumerableIterator`1[System.Reflection.MethodInfo]
System.Linq.IQueryable`1[TSource] source
System.Linq.Expressions.Expression`1[System.Func`3[TSource,System.Int32,System.Boolean]] predicate
--------------------

[jogibear9988]

so you'll see mono has a differnet ToString implementation! Think we should change the code so it does notlook for strings!

[jogibear9988]

I've reported a Mono Issue too, but I think we should fix, as I think the too string output may change on a new runtime. mono/mono#8312