Is there any mothed in C# like
Instr,Mid,Left
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Is there any mothed in C# like
Instr,Mid,Left
Those are all VB.NET Runtime functions. You can reference Microsoft.VisualBasic in a C# app if you want, but there is no need just for that. Those functions all have equivalents in the String class, like IndexOf and Substring. Also, could you please give your threads a name that indicates what they are about. I know you're not here to please me, but personally I find thread titles like "Plzzzzzz Help me" rather annoying. You might as well leave it blank as name it that.
or just use the strings indexOf/StartsWith etc...