Default value for a struct parameter

Question

How to initialize an optional paramerer for a structure type in C# ?
Is it possible in .NET 4.5?

string Foo(string myArg, KeyValuePair<string, string> myOptionalArg = ???)
{
     // todo
}

Servy · Accepted Answer · 2015-02-18 19:15:54Z

5

Yes, you can initialize the optional argument to any compile time literal value that is of the appropriate type. For KeyValuePair the only compile time literal that is of that type (at least in any version of C# that currently exists) will be default(KeyValuePair<string, string>).

answered Feb 18, 2015 at 19:15

Servy

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1 Comment

Steve Mitcham Over a year ago

Note that the values of a default ValueType created this way has each field initialized to their default values. msdn.microsoft.com/en-us/library/aa664475(v=vs.71).aspx

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