diff --git a/.gitignore b/.gitignore
index ec4359b..9826e9b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,5 @@ example/csharp/Example/bin
 example/csharp/Example/obj
 example/csharp/ProtoPlus/obj
 example/csharp/ProtoPlus/bin
+api/csharp/ProtoPlus/bin
+api/csharp/ProtoPlus/obj
diff --git a/example/csharp/ProtoPlus/OutputStream.cs b/example/csharp/ProtoPlus/OutputStream.cs
index 0d2b2af..63c3e98 100644
--- a/example/csharp/ProtoPlus/OutputStream.cs
+++ b/example/csharp/ProtoPlus/OutputStream.cs
@@ -273,7 +273,7 @@ public void WriteUInt64(int fieldIndex, List<ulong> value)
 
         public void WriteFloat(int fieldIndex, float value)
         {            
-            if (value < float.Epsilon)
+            if (value == 0F)
             {
                 return;
             }
@@ -307,7 +307,7 @@ public void WriteFloat(int fieldIndex, List<float> value)
 
         public void WriteDouble(int fieldIndex, double value)
         {
-            if (value < double.Epsilon)
+            if (value == 0D)
             {
                 return;
             }
diff --git a/example/csharp/ProtoPlus/SizeCaculator.cs b/example/csharp/ProtoPlus/SizeCaculator.cs
index 0bf14de..17a00f7 100644
--- a/example/csharp/ProtoPlus/SizeCaculator.cs
+++ b/example/csharp/ProtoPlus/SizeCaculator.cs
@@ -75,7 +75,7 @@ public static int SizeEnum<T>(int fieldIndex, List<T> value) where T : struct, I
 
         public static int SizeFloat(int fieldIndex, float value)
         {
-            if (value < float.Epsilon)
+            if (value == 0F)
             {
                 return 0;
             }
@@ -100,7 +100,7 @@ public static int SizeFloat(int fieldIndex, List<float> value)
 
         public static int SizeDouble(int fieldIndex, double value)
         {
-            if (value < double.Epsilon)
+            if (value == 0D)
             {
                 return 0;
             }