How do I truncate a .NET string?

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I would like to truncate a string such that its length is not longer than a given value. I am writing to a database table and want to ensure that the values I write meet the constraint of the column’s datatype.

For instance, it would be nice if I could write the following:

string NormalizeLength(string value, int maxLength)
{
    return value.Substring(0, maxLength);
}

Unfortunately, this raises an exception because maxLength generally exceeds the boundaries of the string value. Of course, I could write a function like the following, but I was hoping that something like this already exists.

string NormalizeLength(string value, int maxLength)
{
    return value.Length <= maxLength ? value : value.Substring(0, maxLength);
}

Where is the elusive API that performs this task? Is there one?

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