Several ways to truncate text in c#

It is best to create an extension method for simple string manipulations

Option 1 - using substring:

public static string Truncate( this string myString, int maxLength )
{
    if (string.IsNullOrEmpty(myString)) { return myString; }

    return myString.Substring(0, Math.Min(myString.Length, maxLength));
}

Option 2 - using linq:

myString = string.Concat(myString.Take(maxLength));

Option 3 - using index operator (c# 8):

myString = myString[..Math.Min(30, myString.Length)];