How Can I Access Private Methods Using Reflection in C#?

Leveraging Reflection to Call Private C# Methods

Reflection in C# offers the capability to access and invoke private class methods—a functionality typically restricted from external code. This can be advantageous in situations requiring dynamic method calls, contingent on runtime data.

Your code snippet utilizes GetMethod() to locate a method by name. However, GetMethod() defaults to excluding private members. To include private methods, you must incorporate specific BindingFlags when calling GetMethod():

MethodInfo dynMethod = this.GetType().GetMethod("Draw_" + itemType, 
BindingFlags.NonPublic | BindingFlags.Instance);
dynMethod.Invoke(this, new object[] { methodParams });

BindingFlags.NonPublic ensures the inclusion of non-public (private) methods in the search, while BindingFlags.Instance restricts the search to instance methods. This combination guarantees that GetMethod() correctly identifies the desired private method within the current class instance.

For detailed information on customizing your method search, consult the C# documentation on the BindingFlags enumeration. This documentation comprehensively lists all available flags for refining searches across methods, fields, and other class members.

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