I use the following C# code to calculate a MD5 hash from a string. It works well and generates a 32-character hex string like this MD5: “0CBC6611F5540BD0809A388DC95A615B”

Test code:

Console.WriteLine("MD5: " +CreateMD5("Test"));

Microsoft Learn C: MD5 Class

        public static string CreateMD5(string input)
        {
            // Use input string to calculate MD5 hash
            using (System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create())
            {
                byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
                byte[] hashBytes = md5.ComputeHash(inputBytes);

                var hexString = BitConverter.ToString(hashBytes);
                hexString = hexString.Replace("-", "");
                return (hexString); 
            }
        }

        public static string CreateMD5(string input)
        {
            // Use input string to calculate MD5 hash
            using (System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create())
            {
                byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
                byte[] hashBytes = md5.ComputeHash(inputBytes);

                StringBuilder sb = new System.Text.StringBuilder();
                for (int i = 0; i < hashBytes.Length; i++)
                {
                    sb.Append(hashBytes[i].ToString("X2"));
                }
                return sb.ToString();
            }
        }

        public static string CreateMD5(string input)
        {
            // Use input string to calculate MD5 hash
            using (System.Security.Cryptography.MD5 md5 = System.Security.Cryptography.MD5.Create())
            {
                byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);
                byte[] hashBytes = md5.ComputeHash(inputBytes);

                return Convert.ToHexString(hashBytes); // .NET 5 +
            }
        }

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