What is a GUID

For those of you who don’t know, a GUID (pronounced goo’id – Globally unique identifier) is a 128-bit integer that can be used to uniquely identify something. You may store users or products in your database and you want somehow uniquely identify each row in the database. A common approach is to create a autoincrementing integer, another way would be to create a GUID for your products.

How to create a GUID in C#

The GUID method can be found in the System namespace. The GUID method System.Guid.NewGuid() initializes a new instance of the GUID class.

There are also a few overloads available for those of you who want the GUID formatted in a particular fashion.

Example:

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System.Guid.NewGuid().ToString()

There are some overloaded methods. See http://msdn.microsoft.com/en-us/library/system.guid.aspx for more information.

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