Use of String functions

How can I use SUBSTRING and INSTRING in C# ?

String.Substring
String.IndexOf

Use the Substring and IndexOf methods of the String class.

Code:

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string str = "Hello World";

MessageBox.Show(str.Substring(3, 4)); // Displays "lo W"
MessageBox.Show(str.IndexOf('W').ToString()); // Displays 6

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Note that .NET 2.0 strings have a Contains method as well.

Thanks for your answer.

Sohel