Fix flushing of string builder for multi-parameter conditions (#625)

diff --git a/src/Microsoft.Diagnostics.TestHelpers/TestConfiguration.cs b/src/Microsoft.Diagnostics.TestHelpers/TestConfiguration.cs
index 35885c0f6ef69bb9d21f140a46fd1cc696b2f980..07a908138db7dc082f341f9e2a8c34fbbeef64f4 100644 (file)
--- a/src/Microsoft.Diagnostics.TestHelpers/TestConfiguration.cs
+++ b/src/Microsoft.Diagnostics.TestHelpers/TestConfiguration.cs
@@ -290,6 +290,7 @@ namespace Microsoft.Diagnostics.TestHelpers
                     if (isWithinString)
                     {
                         exprParams.Add(resolvedValue.ToString());
+                        resolvedValue.Clear();
                         expectDelimiter = true;
                     }