This post shows you How to retrieve the namespace to a string in C#

For Example:

public partial class MyForm : Form

To get full include namespace and form name you can write

string fullName = this.GetType.FullName;

c# get namespace

string nameSpace = this.GetType().Namespace;

c# get form name

string formName = this.GetType().Name;

or you can use the Type class

Type type = typeof(MyForm);
string nameSpace = type.GetType().Namespace;

Since C# 6.0 you can use nameof keyword

string name = nameof(MyNamespace);