-

OrmTest/ExpressionTest/Select.cs

@@ -16,7 +16,7 @@ namespace OrmTest.ExpressionTest
             Expression<Func<Student, object>> exp = it => new Program() { x = it.Name };
             ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.WhereSingle);
             expContext.ResolveType = ResolveExpressType.SelectSingle;
-            var x= expContext.ToResultString();
+            var x = expContext.Result;
         }
     }
 }

OrmTest/Program.cs

@@ -32,7 +32,7 @@ namespace OrmTest
            // Expression<Func<Student, object>> exp = it => it.Name;
             ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.WhereSingle);
            // var x = expContext.GetFiledName();
-            var xx = expContext.ToResultString();
+           // var xx = expContext.ToResultString();
 
 
             var b = DateTime.Now;

OrmTest/bin/Debug/OrmTest.exe.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
+    </startup>
+</configuration>