diff --git a/AIStudio.Wpf.Flowchart/AIStudio.Wpf.Flowchart.csproj b/AIStudio.Wpf.Flowchart/AIStudio.Wpf.Flowchart.csproj
index 40c1d27..162f6f2 100644
--- a/AIStudio.Wpf.Flowchart/AIStudio.Wpf.Flowchart.csproj
+++ b/AIStudio.Wpf.Flowchart/AIStudio.Wpf.Flowchart.csproj
@@ -12,10 +12,6 @@
     <Description>一个Wpf的流程图控件</Description>
   </PropertyGroup>
 
-  <ItemGroup>
-    <PackageReference Include="MathParser.org-mXparser" Version="4.4.2" />
-  </ItemGroup>
-
   <ItemGroup>
     <None Include="A.png">
       <Pack>True</Pack>
diff --git a/AIStudio.Wpf.Flowchart/FlowchartService.cs b/AIStudio.Wpf.Flowchart/FlowchartService.cs
index c500472..d2a5042 100644
--- a/AIStudio.Wpf.Flowchart/FlowchartService.cs
+++ b/AIStudio.Wpf.Flowchart/FlowchartService.cs
@@ -5,7 +5,10 @@ using System.Linq;
 using System.Windows;
 using System.Windows.Media;
 using AIStudio.Wpf.DiagramDesigner;
-using Expression = org.mariuszgromada.math.mxparser.Expression;
+using Microsoft.CSharp;
+using System.CodeDom.Compiler;
+using System.Reflection;
+using System.Data;
 
 namespace AIStudio.Wpf.Flowchart
 {
@@ -274,17 +277,19 @@ namespace AIStudio.Wpf.Flowchart
                         try
                         {
                             //按条件选择一个分支
-                            string express = step.Value.Replace("data.Flag", nextNode.Text);
-                            Expression e = new Expression(express);
-                            var result = e.calculate();
-                            if (result == 1)
+                            string expression = step.Value.Replace("data.Flag", nextNode.Text);
+
+                            var result = new DataTable().Compute(expression, "");
+                            if (result.Equals(true))
                             {
                                 SetStatus(nextNode, 100);
                                 Next(step.Key, nextNode);
                                 return;
                             }
                         }
-                        catch { }
+                        catch(Exception ex) 
+                        { 
+                        }
                     }
                     //如果表达式错了，就按第一个处理
                     Next(nextNode.SelectNextStep.FirstOrDefault().Key, nextNode);
@@ -367,6 +372,6 @@ namespace AIStudio.Wpf.Flowchart
         public static void DisposeData(IDiagramViewModel viewModel)
         {
             FlowNodes.Remove(viewModel);
-        }
+        }      
     }
 }