Description
An index is the position of a character within a string. The first character in the string is at index 0. The length of a string is the number of characters it is made up of. The last accessible index of a string instance is System.String.Length-1.
Strings are immutable; once created, the contents of a System.String do not change. Combining operations, such as System.String.Replace, cannot alter existing strings. Instead, such operations return a new string that contains the results of the operation, an unchanged string, or the null value. To perform modifications to a System.String use the System.Text.StringBuilder.
Implementations of System.String are required to contain a variable-length character buffer positioned a fixed number ...
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