System.Reflection.Binder.Default.GetBetterMethod C# (CSharp) Method

			MethodBase GetBetterMethod (MethodBase m1, MethodBase m2, Type [] types)
			{
#if NET_2_0
				if (m1.IsGenericMethodDefinition && 
				    !m2.IsGenericMethodDefinition)
					return m2;
				if (m2.IsGenericMethodDefinition && 
				    !m1.IsGenericMethodDefinition)
					return m1;
#endif

				ParameterInfo [] pl1 = m1.GetParameters ();
				ParameterInfo [] pl2 = m2.GetParameters ();
				int prev = 0;
				for (int i = 0; i < pl1.Length; i++) {
					int cmp = CompareCloserType (pl1 [i].ParameterType, pl2 [i].ParameterType);
					if (cmp != 0 && prev != 0 && prev != cmp)
						throw new AmbiguousMatchException ();
					if (cmp != 0)
						prev = cmp;
				}
				if (prev != 0)
					return prev > 0 ? m2 : m1;

				Type dt1 = m1.DeclaringType;
				Type dt2 = m2.DeclaringType;
				if (dt1 != dt2) {
					if (dt1.IsSubclassOf(dt2))
						return m1;
					if (dt2.IsSubclassOf(dt1))
						return m2;
				}

				bool va1 = (m1.CallingConvention & CallingConventions.VarArgs) != 0;
				bool va2 = (m2.CallingConvention & CallingConventions.VarArgs) != 0;
				if (va1 && !va2)
					return m2;
				if (va2 && !va1)
					return m1;

				throw new AmbiguousMatchException ();
			}