public void TryGetEnvVar() { var variable = Guid.NewGuid().ToString(); try { Assert.False(TelemetryConfiguration.TryGetEnvVar(variable, out var content)); Assert.Null(content); Environment.SetEnvironmentVariable(variable, "test"); Assert.True(TelemetryConfiguration.TryGetEnvVar(variable, out content)); Assert.Equal("test", content); } finally { Environment.SetEnvironmentVariable(variable, null); } }