Extension Methods
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Extension Methods
What is Extesion Methods ?
Method allow programmer to "add" methods to existing types without creating a new derived type, recompiling, or by modifying the original type. Methods are static methods they are called as if they were instance methods on the extended type.
Example :
public static class Utilities
{
public static string encryptString(this string str)
{
System.Security.Cryptography.MD5CryptoServiceProvider x = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] data = System.Text.Encoding.ASCII.GetBytes(str);
data = x.ComputeHash(data);
return System.Text.Encoding.ASCII.GetString(data);
}
}
How to call Extension Method ?
As you can see in below image IDE intelligence shows the extension method with the down arrow when you want to call on the given datatype.
