Looks like ExpressionTrees compiler should be near with the C# spec in many behaviors, but unlike C# there is no support for conversion from decimal to any enum-type:

using System;
using System.Linq.Expressions;

class Program
{
  static void Main()
  {
    Func<decimal, ConsoleColor> converter1 = x => (ConsoleColor) x;
    ConsoleColor c1 = converter1(7m); // fine

    Expression<Func<decimal, ConsoleColor>> expr = x => (ConsoleColor) x;

    // System.InvalidOperationException was unhandled
    // No coercion operator is defined between types
    // 'System.Decimal' and 'System.ConsoleColor'.

    Func<decimal, ConsoleColor> converter2 = expr.Compile();

    ConsoleColor c2 = converter2(7m);
  }
}

Other rarely used C# explicit conversions, like double -> enum-type exists and works as explained in C# specification, but not decimal -> enum-type. Is this a bug?

c# .net expression-trees
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