C# 3.0 Cookbook, 3rd Edition

13.3. Finding Overridden Methods

Problem

You have an inheritance hierarchy that is several levels deep and has many virtual and overridden methods. You need a list of the base class method(s) that are overridden by method(s) within a derived class.

Solution

Use theMethodInfo.GetBaseDefinition method to determine which method is over-ridden in what base class. The overloaded FindMethodOverrides method shown in Example 13-2 examines all of the public instance methods in a class and displays which methods override their respective base class methods. This method also determines which base class the overridden method is in. This method accepts an assembly path and name in which to find overriding methods. Note that the typeName parameter must be the fully qualified type name (i.e., the complete namespace hierarchy, followed by any containing classes, followed by the type name you are querying).

Example 13-2. The FindMethodOverrides methods

public class ReflectionUtils
{
    public static void FindMethodOverrides(string asmPath, string typeName)
    {
        Assembly asm = Assembly.LoadFrom(asmPath);
        Type asmType = asm.GetType(typeName);

        Console.WriteLine("---[" + asmType.FullName + "]---");

        // get the methods that match this type
        MethodInfo[] methods = asmType.GetMethods(BindingFlags.Instance |
        BindingFlags.NonPublic | BindingFlags.Public |
        BindingFlags.Static | BindingFlags.DeclaredOnly);

        var mis = from ms in methods
                  where ms != ms.GetBaseDefinition() select ms.GetBaseDefinition(); foreach (MethodInfo ...