Home Library Learn Samples Downloads Support Community Forums
MSDN Library
Development Tools and Languages
Visual Studio 2012
Visual Basic and Visual C#
Visual C#
C# Reference
C# Compiler Errors
Compiler Error CS0001
Compiler Error CS0006
Compiler Error CS0007
Compiler Error CS0015
Compiler Error CS0016
Compiler Error CS0019
Compiler Error CS0029
Compiler Error CS0034
Compiler Error CS0038
Compiler Error CS0039
Compiler Error CS0050
Compiler Error CS0051
Compiler Error CS0052
Compiler Error CS0071
Compiler Error CS0103
Compiler Error CS0106
Compiler Error CS0115
Compiler Error CS0116
Compiler Error CS0120
Compiler Error CS0122
Compiler Error CS0134
Compiler Error CS0151
Compiler Error CS0163
Compiler Error CS0165
Compiler Error CS0173
Compiler Error CS0178
Compiler Error CS0188
Compiler Error CS0201
Compiler Error CS0229
Compiler Error CS0233
Compiler Error CS0234
Compiler Error CS0246
Compiler Error CS0260
Compiler Error CS0266
Compiler Error CS0269
Compiler Error CS0270
Compiler Error CS0304
Compiler Error CS0310
Compiler Error CS0311
Compiler Error CS0413
Compiler Error CS0417
Compiler Error CS0433
Compiler Error CS0445
Compiler Error CS0446
Compiler Error CS0504
Compiler Error CS0507
Compiler Error CS0518
Compiler Error CS0523
Compiler Error CS0545
Compiler Error CS0552
Compiler Error CS0563
Compiler Error CS0570
Compiler Error CS0571
Compiler Error CS0579
Compiler Error CS0592
Compiler Error CS0616
Compiler Error CS0650
Compiler Error CS0686
Compiler Error CS0702
Compiler Error CS0703
Compiler Error CS0731
Compiler Error CS0826
Compiler Error CS0834
Compiler Error CS0840
Compiler Error CS0843
Compiler Error CS0845
Compiler Error CS1001
Compiler Error CS1009
Compiler Error CS1018
Compiler Error CS1019
Compiler Error CS1026
Compiler Error CS1029
Compiler Error CS1061
Compiler Error CS1112
Compiler Error CS1501
Compiler Error CS1502
Compiler Error CS1519
Compiler Error CS1540
Compiler Error CS1546
Compiler Error CS1548
Compiler Error CS1564
Compiler Error CS1567
Compiler Error CS1579
Compiler Error CS1612
Compiler Error CS1614
Compiler Error CS1640
Compiler Error CS1644
Compiler Error CS1656
Compiler Error CS1674
Compiler Error CS1703
Compiler Error CS1704
Compiler Error CS1705
Compiler Error CS1708
Compiler Error CS1716
Compiler Error CS1721
Compiler Error CS1726
Compiler Error CS1729
Compiler Error CS1919
Compiler Error CS1921
Compiler Error CS1926
Compiler Error CS1933
Compiler Error CS1936
Compiler Error CS1941
Compiler Error CS1942
Compiler Error CS1943
Compiler Error CS1946
Compiler Error CS2032
Compiler Warning (level 1) CS0420
Compiler Warning (level 1) CS0465
Compiler Warning (level 1) CS1058
Compiler Warning (level 1) CS1060
Compiler Warning (level 1) CS1598
Compiler Warning (level 1) CS1607
Compiler Warning (level 1) CS1616
Compiler Warning (level 1) CS1658
Compiler Warning (level 1) CS1683
Compiler Warning (level 1) CS1685
Compiler Warning (level 1) CS1690
Compiler Warning (level 1) CS1691
Compiler Warning (level 1) CS1699
Compiler Warning (level 1) CS1762
Compiler Warning (level 1) CS1956
Compiler Warning (level 1) CS3003
Compiler Warning (level 1) CS3007
Compiler Warning (level 1) CS3009
Compiler Warning (level 1) CS4014
Compiler Warning (level 2) CS0108
Compiler Warning (level 2) CS0467
Compiler Warning (level 2) CS0618
Compiler Warning (level 2) CS1701
Compiler Warning (level 3) CS0675
Compiler Warning (level 3) CS1700
Compiler Warning (level 4) CS0429
Compiler Warning (level 4) CS1591
Compiler Warning (level 4) CS1610
Expand Minimize
This topic has not yet been rated - Rate this topic

Compiler Error CS0834

Visual Studio 2012

A lambda expression must have an expression body to be converted to an expression tree.

Lambdas that are translated to expression trees must be expression lambdas; statement lambdas and anonymous methods can only be converted to delegate types.

To correct this error

  • Remove the statement from the lambda expression.

The following example generates CS0834:

Copy 
// cs0834.cs
using System;
using System.Linq;
using System.Linq.Expressions;

public class C
{
    public static int Main()
    {
        Expression<Func<int, int>> e = x => { return x; }; // CS0834
    }
}
Did you find this helpful?
(1500 characters remaining)
© 2013 Microsoft. All rights reserved.