add a setter to a class in csharp

In C#, you can add a setter to a class property to allow external code to modify that property's value. Here's an example of how to add a setter to a class property:

main.cs
public class MyClass {
    private string _myProperty;

    public string MyProperty {
        get {
            return _myProperty;
        }
        set {
            _myProperty = value;
        }
    }
}
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In the above example, we define a private field _myProperty and a public property MyProperty. The get accessor retrieves the current value of _myProperty, and the set accessor sets the value of _myProperty to the new value passed as an argument.

To use the setter, simply assign a new value to MyProperty:

main.cs
MyClass myInstance = new MyClass();
myInstance.MyProperty = "new value";
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This will call the set accessor and assign the value "new value" to _myProperty.