c# - case statement for logical operators -

i getting "cannot implicitly convert string char" error. trying following code, how should specify cast in case statement <= operator. help/direction appreciated. thanks!

char test1;     switch(test1)     {        case '+':         //do         break;        case '-' : case '*' : case '<=' :        //method1        break      method 1:      private void method1(char test2)      {       if(test2 == '+' || test2 == '*' || test2.tostring() == "<=")        {          token.add(test2.tostring());        }     } 

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ok, have method1 this:

private void method1(char test2) {   if(test2 == '+' || test2 == '-' || test2 == '/' || test2 == '*')     {        //code        tokens.add(test2);     }  char test1;         switch(test1)         {            case '+': case '-' : case '*': case '/':             method1(test1);             break; 

i trying tokens if there expression (a+b)*(a-b). tokens list of string here. but, trying here check logical operators if exist in expression...ex: (a+b)<=5, in case, want check if next token <=, if add list of tokens, goal have 1 method handle operators(+,-, *,/,<=,>=, ==, !=) , call in switch case statement.

you can use actiondictionary instead of switch case statement:

private void test(string operant) {     dictionary<string, action> actionmap = new dictionary<string, action>();     // map operant action methods     actionmap.add("+", new action(addtoken));     actionmap.add("-", new action(addtoken));     actionmap.add("*", new action(addtoken));     actionmap.add(">=", () =>     {         // anynomous method         token.add(">=");     });     actionmap.add("/", new action(divide));     actionmap.add("<=", new action(lessthanorequal));      // list keep continue here       foreach (string key in actionmap.keys)     {         if (key == operant)         {             actionmap[key]();         }      } }  private void addtoken() { }  private void divide() { }  private void lessthanorequal() { }  // .. , on