[Solved]-Getting MethodInfo without name as string-LINQ,C#

i don't understand what you are doing, i think you could probably completely avoid some of the code you show here.

i wrote this "getmembername" extension method, you probably can do something with this code:

public static string getmembername<t, tresult>(
    this t anyobject, 
    expression<func<t, tresult>> expression)
{
    return ((memberexpression)expression.body).member.name;
}

// call as extension method, if you have a instance
string lengthpropertyname = "abc".getmembername(x => x.length);

// or call as a static method, by providing the type in the argument
string lengthpropertyname = reflectionutility.getmembername(
    (string x) => x.length);

edit:

just to sketch up a solution:

public static bool ismethod<tresult>(
  methodinfo method, 
  expression<func<tresult>> expression)
{
  // i think this doesn't work like this, evaluate static method call
  return method == ((memberexpression)expression.body).member;
}

if (ismethod(expr.method, () => sqlfilterextensions.like))
{
  // generate sql
}