Why does Property Set throw StackOverflow exception?

by

It’s because you’re recursively calling the property – in the set you are setting the property again, which continues ad infinitum until you blow the stack.

You need a private backing field to hold the value, e.g.

private string firstName;

public string FirstName
{
    get
    {
        return this.firstName;
    }
    set
    {
        this.firstName = value;
    }
}

Alternatively, if you’re using C# 3.0, you could use an auto-property, which creates a hidden backing field for you, e.g.

public string FirstName { get; set; }

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