我找到了只获取我创建的方法的名称的方法。

Type methodInfoType = (typeof(Form_CreateNodes));
// Get the public methods.
MethodInfo[] arrayOfPublicMethodsNames = methodInfoType.GetMethods(
    BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly);

// Get the nonpublic methods.
MethodInfo[] arrayOfNonpublicMethodsNames = methodInfoType.GetMethods(
    BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly);