How to create a delegate from a MethodInfo when method signature cannot be known beforehand?

Question

I need a method that takes a MethodInfo instance representing a non-generic static method with arbitrary signature and returns a delegate bound to that method t

Answer 1

You may want to try System.LinQ.Expressions

...
using System.Linq.Expressions;
...

static Delegate CreateMethod(MethodInfo method)
{
    if (method == null)
    {
        throw new ArgumentNullException("method");
    }

    if (!method.IsStatic)
    {
        throw new ArgumentException("The provided method must be static.", "method");
    }

    if (method.IsGenericMethod)
    {
        throw new ArgumentException("The provided method must not be generic.", "method");
    }

    var parameters = method.GetParameters()
                           .Select(p => Expression.Parameter(p.ParameterType, p.Name))
                           .ToArray();
    var call = Expression.Call(null, method, parameters);
    return Expression.Lambda(call, parameters).Compile();
}

and use it later as following

var method = CreateMethod(typeof (Console).GetMethod("WriteLine", new[] {typeof (string)}));
method.DynamicInvoke("Test Test");