Check out example codes for "create a hash of an XML c#". It will help you in understanding the concepts better.

Code Example 1

System.Security.Cryptography.MACTripleDES hash = new System.Security.Cryptography.MACTripleDES(Encoding.Default.GetBytes("mykey"));
string hashString = Convert.ToBase64String(hash.ComputeHash(Encoding.Default.GetBytes(myXMLString)));

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