Compiler Error CS1930
The range variable 'name' has already been declared
The range variable in a query expression is in scope until the query expression terminates. It must therefore have a unique identifier.
- Give a unique name to each range variable that is introduced in a query expression.
The following example generates CS1930 because the identifier num
is used for the range variable in the from
clause and for the range variable introduced by the let
clause.
// cs1930.cs
using System.Linq;
class Program
{
static void Main()
{
int[] nums = { 0, 1, 2, 3, 4, 5 };
var query = from num in nums
let num = 3 // CS1930
select num;
}
}
Collaborate with us on GitHub
The source for this content can be found on GitHub, where you can also create and review issues and pull requests. For more information, see our contributor guide.
.NET feedback
.NET is an open source project. Select a link to provide feedback: