Table of Contents

String concatenation

If the StringConcat option specified the result will be a string concatenation. Otherwise, it will try to perform an arithmetic addition if possible. When the arithmetic operation fails, if both values are strings then the result will be a string concatenation.

Example

With this option enabled, string concatenation will always happen.

var expression = new Expression($"5 + '1'", ExpressionOptions.StringConcat);
var result = expression.Evaluate();
Debug.Assert(result); // 51

Summary

Expression StringConcat Enabled StringConcat Disabled
'L' + 'eo' 'Leo' 'Leo'
1 + '2' '12' 3
'1' + '2' '12' 3