how to remove carriage returns, newlines, spaces from a string
If this is valid XML you could use the SaveOptions.DisableFormatting enumeration:
string input = @"<TestItem1Request> <Username>admin</Username> <Password>123abc..@!</Password> <Item1>this is an item</Item1></TestItem1Request>";string result = XElement.Parse(input).ToString(SaveOptions.DisableFormatting);Console.WriteLine(result);