System.Reflection.Emit.DynamicMethod.RTDynamicMethod.IsDefined C# (CSharp) Method

            public override bool IsDefined(Type attributeType, bool inherit) {
                if (attributeType == null)
                    throw new ArgumentNullException("attributeType");

                if (attributeType.IsAssignableFrom(typeof(MethodImplAttribute))) 
                    return true;
                else
                    return false;
            }