1. Using .ToString()
long testField = 100; string stringEquivalent = testField.ToString();
2. Using string.Format
long testField = 123; string stringEquivalent = string.Format("{0}", testField);
3. Using Convert.ToString
long testField = 123; string stringEquivalent = Convert.ToString(testField);
4. Using String interpolation
long testField = 123; string stringEquivalent = $"{testField}";
5. Using + operator
long testField = 123; string stringEquivalent = "" + testField;
6. Using StringBuilder
l ong testField = 123; string stringEquivalent = new StringBuilder().Append(testField).ToString();
7. Using TypeConverter
TypeConverter converter = TypeDescriptor.GetConverter(typeof(long)); long testField = 123; string stringEquivalent = (string)converter.ConvertTo(testField, typeof(string));