尝试一下，

Try out this,

str1.substring(7);

除了现有答案外，还请注意:字符串是不可变的 .不管您使用字符串是什么，都永远不会删除"，添加"或修改"字符串中的任何内容.而是创建了一个全新的字符串.重要的是要知道它的性能和对多线程的影响.例如，重复"+"是非常糟糕的.字符串的可变版本是System.Text.StringBuilder.使用它来提高性能，只需使用System.Text.StringBuilder.ToString()即可转换为字符串.

—SA

Just a note, in addition to existing answers: strings are immutable. No matter you do with strings, you never "remove", "add" or "modify" anything it a string. Instead, a brand-new string is created. It''s important to know due to its performance and multithreading implications. For example, repeating "+" is very bad. A mutable version of string is System.Text.StringBuilder. Use it for performance, convert to string simply using System.Text.StringBuilder.ToString().

—SA

***的办法是在分隔符:"
上分割字符串

the best thing would be to split your string on a seperator ":"

string s = "Name : Mohd Wasif";
string[] words = s.Split( '':''); // split string on seperator

Label.Text = words[1].Trim( ); // assign trimmed value without leading or trailing spaces