How to pass StartsWith() as a parameter to Expression.Call()?

Question

Im trying to call StartsWith() function as an expression and pass a constant to it.

var textConstant =Expression.Constant(text);
var startsWith = Expression.Call(StartsWith ,textConstant); //something like this

Im new to c# and I couldn't figure out how to pass these into Expression.Call().

Answer 1

Here is sample:

 string text = "Some string";
 string startsText = "Some";
        
 Expression callExpr = Expression.Call(
                          Expression.Constant(text), 
                          typeof(String).GetMethod("StartsWith", 
                                         new Type[] { typeof(String) }),
                          Expression.Constant(startsText));
        
 // print the expression
 Console.WriteLine(callExpr);
        
 // execute the expression
 var lambda = Expression.Lambda<Func<bool>>(callExpr).Compile();
 Console.WriteLine(lambda());