Interception and substitution of C # strings

1. Take the first n characters of a string

(1) String str1=str. Substring (0,n);

(2) String str1=str. Remove (i,str. LENGTH-N);

2. Remove the first n characters of a string

String Str1=str. Remove (0,n);

String Str1=str. SubString (n);

3, start from the right to take n characters:

String Str1=str. SubString (str. LENGTH-N);

String Str1=str. Remove (0,str. LENGTH-N);

4, start from the right to remove n characters:

String Str1=str. Substring (0,str. LENGTH-N);

String Str1=str. Remove (str. LENGTH-N,N);

5. If there is "ABC" in the string, replace it with "ABC"
Str=str. Replace ("abc", "abc");

6. C # intercepts the last character of a string

Str1. Substring (str1. LastIndexOf (",") +1);

7. C # intercepts the last character of a string

str = str. Substring (str. Length-1, 1);

Interception and substitution of C # strings